Learning Objectives
By the end of this section, you will be able to:
- Explain the changes involved in puberty and the ranges of pubertal timing
- Describe current statistics on adolescent sexual behavior
- Describe factors related to early sexual intercourse and associated health risks including unplanned pregnancy and STIs
- Identify the various types of sex education and the ways they impact sexual health and behaviors
Braden and Ashley were both sixteen years old when they met and have been in a relationship for two years. They became each other’s first sexual partners and have been enjoying that intimacy for the past year. Ashley began taking the birth control pill a few months after they started having intercourse, and they agreed to use external condoms as a backup method of contraception and to prevent contracting any STIs. Recently, though, Ashley calls Braden less often and the frequency of sexual activity has also declined, as their relationship changes over time. During puberty and the adolescent period, many teens become curious about their bodies and may begin having sexual experiences and relationships; physical and emotional development and characteristics, sociocultural differences, self-esteem, and sexuality all influence the scope, timing, and pace of these experiences.
Puberty
The term puberty describes the process of a child’s transition to physical and reproductive maturity, and the period during which it occurs. Puberty lasts for about four years on average. It typically begins between the ages of eight and thirteen years in females, and between nine and fourteen years in males (NIH, 2024). Its onset is influenced by many factors, both biological and environmental.
The visible signs of puberty are evident in physical developments that are categorized into primary sex characteristics and secondary sex characteristics. The primary sex characteristics are physical developments that are directly related to the ability to reproduce: changes in the ovaries and uterus in females, and the testes and penis in males. For males, spermarche (sometimes called semenarche) is the first ejaculation; this marks the start of the ability to reproduce. This first ejaculation is often experienced as a nocturnal emission, or while they are asleep. For females, menarche, the onset of menstruation, marks this stage. The secondary sex characteristics are physical developments that accompany primary sex characteristics but are not directly related to the ability to reproduce. These include breast development in females (called thelarche), growth of underarm and pubic hair (adrenarche) in both sexes, and facial hair and a deepening voice in males.
The timing of the onset of puberty varies from individual to individual, but typically these developments follow the same sequence of changes. Biological, environmental, and sociocultural factors play a role in this timing. Figure 9.4 shows the typical timelines for various aspects of pubertal development in males and females. Notice, for example, that some of the earliest changes for females are growth of the ovaries and breasts, while for males, growth of the testis occurs before other aspects of puberty.
Biological Factors Affecting Pubertal Development and Timing
The onset of puberty is influenced by a variety of biological factors, including genetics, physical changes in the body’s muscle and fat mass, production of hormones, the functioning of the hypothalamus-pituitary (HPA) axis, and the development of puberty-related glands (Figure 9.5).
The HPA is essential for physical and sexual development during puberty (Figure 9.6). At the beginning of puberty, the hypothalamus signals the pituitary gland to release sex-specific hormones that act on the testes in males and ovaries and females. The brain releases a hormone called gonadotropin-releasing hormone (GnRH). GnRH triggers the pituitary gland—a small but significant gland that controls the production of several major hormones—to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH) into the bloodstream. This in turn begins the series of changes that are associated with puberty, transforming the body to be capable of reproduction.
Link to Learning
Watch this 2-minute neuroscience video about the hypothalamus and pituitary gland to understand their roles and how they interact.
Factors such as early activation of the HPA, family history, genetic variations, and dealing with additional stressors are known predictive factors for early onset of puberty in females and males (Farello et al., 2019; Gaydosh et al., 2018). Additionally, in females, a certain amount of body fat is necessary for the onset of puberty for two reasons: first, a body composition that is low in fat might not have enough energy stored to support the physical changes that come with puberty. Second, body fat is linked to the production of estrogen, a key hormone in the development of the female reproductive system and the maintenance of its functions. Adequate levels of estrogen are needed for the development of primary sexual characteristics like the regulation of the menstrual cycle, as well as secondary sexual characteristics like breast development. The hormone leptin is also thought to play a role in triggering puberty (Ahmed et al., 1999; Blum et al., 1997; Evans et al., 2022), and it is released into the bloodstream by adipose tissue (fat stores). When fat stores are at a level sufficient to indicate a healthy adolescent, leptin may signal the hypothalamus to begin releasing the cascade of hormones that sets puberty in motion (Murray & Clayton, 2013). Thus, the intricate interplay between genetics, stress, body fat, and hormones influences the timing of puberty in females.
In males, the timing of puberty is less understood. Similar to females, higher levels of central fat mass distribution were found to be associated with early onset of puberty (Kindblom et al., 2006); however, the role of leptin and the underlying mechanism of its role were not clear (Kaplowitz, 2008). A longitudinal study found that the higher weight prior to puberty could predict the onset of puberty and could be a better predictor of puberty onset than BMI (Bygdell et al., 2021). Additionally, other researchers have found a link to earlier onset of puberty and higher type 2 diabetes risk (Ohlsson et al., 2020), which might have implications for males as they get older.
The timing of puberty has a strong genetic component (Hoyt et al., 201). The age at which an individual’s biological parents went through puberty is a strong determinant in the timing of puberty for their adolescent offspring (Wohlfahrt-Veje et al., 2016). Although timing of parents’ puberty is the strongest predictor of puberty, sociocultural factors also play a role. For example, a study on Korean adolescents found that boys without their fathers present in the household experienced spermarche about three months earlier than those with their fathers present, though there were no differences in timing of menarche for girls (Susie Lee & Semenchanko, 2023). In contrast, a study on adolescents in the United States found that girls whose fathers were absent experienced puberty earlier (Gaydosh et al., 2018). Additionally, Arim et al (2011) found that low socioeconomic status (SES) predicted early puberty in Canadian males and females. Researchers still do not fully understand these sociocultural influences, though many speculate that factors like family stress may speed up the onset of puberty. It is important to consider the implications of both nature and nurture as well as the ways nature and nurture interact to shape development.
Environmental and Sociocultural Factors Affecting Pubertal Development and Timing
Psychologists most often measure the timing of puberty by self-report. Adolescent girls are asked to report the date of their first menstrual cycle, while boys are often asked about the development of various secondary sex characteristics (Hoyt et al., 2020). Recall that for males, puberty starts with the first ejaculation, but often males are not able to clearly recall that event, whereas females can often accurately identify their first menstrual cycle. These data are key to understanding potential links to health outcomes later in life. Pubertal timing can influence age at sexual initiation, learning and growth, and physiological health (Leone & Brown, 2020; Torvik et al., 2021).
Environmental factors related to the timing of puberty have been most extensively explored in females, potentially because of concerns related to the health risks commonly found in early-maturing girls, such as unplanned and early pregnancies and increased risks of gender-based violence (Sommer et al., 2014). Research on males may have also been less common because adolescent males are less likely to discuss spermarche (Frankel, 2002). In fact, even though adolescent males commonly learned about puberty from their parents, most report that nobody talked to them about spermarche, either before or after (Frankel, 2002; Mercer, 2021). This may be in part because spermarche is most common at night during sleep, which affords males some greater privacy in the experience, whereas menarche’s timing is less predictable. Most adolescent females report having advance knowledge or conversations in preparation for menarche, most often with their mother (Sooki et al., 2016).
In females, individual and environmental factors in pubertal timing include nutrition, body weight, household composition, exercise, environmental chemicals, and overall levels of stress. While acute stress may delay puberty for teens of disadvantaged SES in lower- and middle-income countries due to stunted growth (because of the lack of ample nutritious foods), emotional and behavioral difficulties could bring puberty onset forward by reducing physical activity and encouraging an unhealthy diet (Kelly et al., 2016). On the contrary, a lower SES is typically linked to a higher risk of overweight/obesity and a faster pace of physical and sexual maturation in high-resource environments like the United States. Furthermore, disparities in the timing of puberty among historically oppressed groups reflect the stress and impacts of systemic racism (Bleil et al., 2017; Glass et al., 2022).
Psychologists studying pubertal timing also ask adolescents whether they feel they look older than (an indicator of early puberty), younger than (an indicator of late puberty), or the same age (on time) as their peers. This is called peer-relative timing. In researching the consequences of pubertal timing, psychologists often measure two possibilities—whether early onset of puberty alone is associated with various outcomes or whether the significant factor is being “off-time”—whether early or late relative to peers. For instance, developmental research indicates that girls who experience early puberty are more likely to engage in risk-taking behaviors, begin sexual activity earlier, use tobacco and alcohol more frequently, and experience higher rates and higher severity of depression, anxiety and other mental health risks, and an increased risk of relationship difficulties (Graber, 2013; Mendle et al., 2007; Rapee et al., 2019). Overall, earlier pubertal timing, both objectively and relative to peers, put both girls and boys at risk during adolescence, while later timing was somewhat protective (Table 9.2).
| Females | Males | ||
|---|---|---|---|
| Adolescent Health Outcomes | Adolescent Health Outcomes | ||
| Early-Onset | Late-Onset | Early-Onset | Late-Onset |
| More socioemotional symptoms including depression and anxiety | Less antisocial behaviors | More antisocial behaviors | More depressive symptoms |
| More risk-taking behavior | Lower risk-taking behaviors | More risk-taking behaviors | Less antisocial behaviors |
| Victim of bullying/teasing | Less physical activity | Less sleep hours | Less physical activity |
| Higher BMI | Lower BMI | Higher BMI | Lower BMI |
| Higher self-reported good health in young adulthood | More depressive symptoms | Lower screen time in young adulthood | More sleep hours |
Hoyt and colleagues (2020) used a nationally representative longitudinal data set that followed adolescents into young adulthood. Their findings are consistent with previous studies that supported the early-timing hypothesis. If a teen hits puberty very early (before 84 percent of their peers), it is associated with several negative consequences. In females, it is linked to increased health risks and higher BMI. Higher BMI can, in turn, result in early physical maturation, growth of breasts, and teasing about appearance. Thus, early-maturing females are at a higher risk of appearance-related anxiety, eating disorders, and body dysmorphia symptoms (Zimmer-Gembeck et al., 2018). Males who enter puberty earlier than peers report more risk-taking behavior, more drug use (Dudovitz et al., 2015), more sex partners, more sleep, and higher BMI (Hoyt et al., 2020). Late-onset puberty for boys, however, may increase some risks such as depressive symptoms and lower physical activity (Hoyt et al., 2020). When it comes to the timing of puberty, research overall indicates it is a little easier for youth who are on time or late-onset, than for those who are early-onset.
Adolescents experiencing early-onset puberty have additional challenges: their bodies might be changing before they are emotionally mature enough to handle the impacts presented by secondary sexual characteristics such as breasts. This can put them at risk of gaining attention from older teens and adults who may expose them to behaviors they are unprepared for, such as early sexual experiences (Mendle et al., 2007), exposure to pornography (Nieh et al., 2019), or experimentation with substance use (Castellanos-Ryan et al., 2013). Being at a higher risk does not mean the adolescent will definitely experience negative outcomes, and many early-onset adolescents overcome the challenges of early puberty in adulthood or never experience these risks due to a supportive environment. For example, there are many protective factors that can reduce risks related to off-time puberty, especially high-quality caregiving including higher warmth (e.g., authoritative parent), better communication, and the caregiver having more awareness of how the adolescent spends their time (Mrug et al., 2008).
On a historical note, a long-standing trend is apparent in the timing of pubertal onset. In Western regions like the United States and Europe, age at menarche declined dramatically from about seventeen years in the early nineteenth century to about thirteen years by the middle of the twentieth century. Starting in the 1960s, the age of onset of puberty seemed to have leveled off in Europe and the United States, although minor but significant declines of two and a half to four months have been reported during the past twenty-five years (Aksglaede et al., 2009; Eckert-Lind et al., 2020; Rubin et al., 2009; Sorensen et al., 2012). This tendency is an example of a secular trend. A secular trend is a long-term trend that lasts for several years or even decades as it manifests in the living conditions of a population and highlights any imbalance in health trends within the same population.
The most likely explanation for the decline in age of menarche is that nutrition has steadily improved, generation over generation, allowing for the body to more effectively prepare for the physical changes of puberty. Higher SES is also predictive of an earlier age of menarche, most likely because greater access to resources typically allows for greater nutritional access. In some countries, a similar link has been found between higher socioeconomic status and declining age at menarche. For instance, in the Philippines, earlier menarche was characteristic of girls who lived in urban, higher SES households, characterized by higher maternal education, better housing, and household asset ownership (Adair, 2001). Also, studies in Nigeria and Bangladesh found that girls from families of higher SES, as indicated by parental education and/or occupation, had an earlier age at menarche compared to girls from families of lower SES (Hossain et al., 2010; Onyiriuka & Egbagbe, 2013). One study done in Italy additionally suggests that the age at menarche has started to level off because socioeconomic conditions such as nutrition and hygiene have stopped improving (Piras et al., 2020).
The timing of puberty and related experiences also varies considerably by race and ethnicity. Black girls experience pubertal changes such as breast growth, pubic hair development, and menarche earlier than non-Black girls (Keenan et al., 2014; Osinubi et al., 2022). Early childhood stress and trauma due to discrimination and racism may disproportionately affect Black girls’ HPA activation resulting in earlier puberty (Warner, 2017). For Black, White, and Hispanic girls, household stress and instability are often associated with both earlier puberty and earlier menarche, though this association was not found for Asian and Pacific Islander youth (Aghaee et al., 2020).
Extensive research suggests that sociocultural experiences during puberty can have long-lasting effects on youth development. Specifically, social-contextual factors, including parental and peer relationships, school experience, and neighborhood conditions, are associated with increased risks of delinquency or lower social competence for boys with earlier puberty (Klopack et al., 2020). For girls who experience puberty earlier, peer pressure, harsh parenting, and environmental uncertainty increase risks of delinquency and other externalizing behaviors (Klopack et al., 2020; Najman et al., 2009).
Additionally, researchers have found that how puberty timing affects mental health can vary based on race and ethnicity, especially when considering other environmental factors. For example, early-maturing Hispanic females and males experienced more mental health issues when inhabiting areas with a significant proportion of White population (Seaton et al., 2022; White et al., 2013). Relatively late maturing African American females reported more difficulty internalizing after facing peer victimization (Hamlat et al., 2014), and those with a strong sense of racial identity experienced more difficulties in predominantly White schools (Seaton & Carter, 2018). Thus, minoritized teens undergoing off-time puberty display higher risk for psychological problems within low ethnic minority schools and communities.
Link to Learning
Watch this overview of what adolescence means and the role of puberty during this time. This helpful recap highlights the biological basis of puberty and discusses some of the social factors teens experience.
Adolescent Sexual Behaviors
The development of an adolescent’s sexuality and sexual behavior involves exploring the motivational and functional components of sexuality, such as sexual desire, sexual arousal, and sexual function, that are critical to understanding adult sexual life. Adolescent sexuality is shaped by a variety of contextual factors from the individual level (e.g., biological and neurological growth, personality, gender identity) to social-contextual environmental levels (e.g., influences from parents and peers, school and neighborhood influences) to the broader cultural contextual levels (e.g., media, cultural values) (Kar et al., 2015). This results in wide variability in adolescent sexual behaviors, interests, and overall sexuality.
Sexual activity encompasses a wide range of behaviors aimed at experiencing pleasure or intimacy, including both solitary activities (like masturbation) and partnered activities (like kissing, touching, oral sex, vaginal intercourse, and anal intercourse). Partnered activities may or may not involve physical contact. For example, sending sexual text messages (sexts) or other verbal communication is still a form of sexual activity. “Having sex” commonly refers to sexual intercourse, which involves penetration (e.g., of the mouth, vagina, or anus), which may be done using a penis, fingers, or other objects. However, sex may also be the word used to describe other forms of sexual activity such as external stimulation of genitalia or other erogenous zones (e.g., nipples). Remember, sexual activity should always be consensual, and respecting diverse sexual orientations is crucial.
Adolescence is often a time of self-exploration, including different types of sexual practices, such as masturbation. However, teens in this developmental phase may also engage in risky sexual behaviors such as unprotected penile-vaginal intercourse (PVI) (Thoma et al., 2013) and intercourse under the influence of alcohol or drugs (Rosario et al., 2014). Hence, the development of adolescent sexuality can lead to undesirable consequences for some teens, including emotional distress, the risk of contracting STIs, and unplanned pregnancy.
The Centers for Disease Control and Prevention (CDC) has researched adolescent behaviors for several decades using a survey called the Youth Risk Behavior Surveillance System (YRBSS). Data are collected every two years on a nationally representative sample of more than 10,000 U.S. high school students in grades nine through twelve. The questionnaires are answered anonymously, and results for individual years are reported as well as trends that emerge across multiple years. These data provide a comprehensive picture of mental and physical health-related behaviors in teens.
In 2021, 30 percent of high school students reported having had sexual intercourse (CDC, 2021). Females and males reported similar rates (31 and 30 percent, respectively), and this pattern held true across ethnoracial groups, except for Asian American teens, with only 11 percent responding they had ever had sex. Further, LGBTQ+ teens reported having had sex at a slightly higher but not significantly different rate than their heterosexual peers (33 versus 29 percent, respectively).
The ten-year trend results from the YRBSS show a marked and steady decline in sexual activity. In 2011, the proportion of high school students who had ever had sex was 49 percent, but in 2021 that dropped to 30 percent. This means more than two-thirds of high school students have not had sexual intercourse. When asked to report whether they are currently sexually active, 21 percent of teens reported in the affirmative. Note that the word “intercourse” was not defined to the high school students who completed the survey, so they may have varied understandings of what counts as sexual activity or intercourse. While greater than 90 percent of adolescents are likely to think of sexual intercourse as meaning PVI, only around 60 percent think of anal sex as intercourse, and only around 20 percent think of oral sex as a form of intercourse (Lindberg et al., 2021). Since the YRBSS is not defining sexual intercourse and many adolescents interpret the term differently, any findings are subject to differences in individual knowledge and perspective. However, there is likely underreporting on surveys as many adolescents may underestimate the behaviors that count as sex or may have never had intercourse defined to them (Figure 9.7).
Knowledge and attitudes regarding sexual behavior are heavily influenced by where they acquire their knowledge—most often from parents, peers, or the media. While around 61 percent of adolescents learn some level of sex education and contraception knowledge from their parents, the next most common source of information is peers (Bleakley et al., 2018). Moreover, researchers have found that teenagers who engage in frequent discussions with their peers about sex tend to have more favorable perceptions regarding potential social advantages (such as increased popularity through sexual activity) and enjoyment linked to sex, while being less inclined to anticipate social consequences (like stigma or loss of self-esteem) associated with it (Bleakley et al., 2018; Ragsdale et al., 2014). Adolescents were also twice as likely to talk about sex with their mother/woman caregiver than their father/man caregiver, though they strongly preferred communicating with peers over either caregiver (Ragsdale et al., 2014).
Very few respondents to the 2021 YRBSS indicated they had had four or more sexual partners so far—just 6 percent—also down from the 2011 figures (18 percent for males, 13 percent for females). Of those who reported being sexually active, 52 percent reported using a condom during their most recent intercourse, 33 percent reported using hormonal birth control (such as the pill), and 10 percent reported effectively using both condoms and hormonal birth control together. The most used contraceptive method among teens between 2011 and 2015 remained the condom (reported by 97 percent of teen females), followed by withdrawal (60 percent) and the pill (56 percent) (Harper et al., 2018). These low rates of effective contraception increase the risks for unplanned pregnancy and for spreading an STI. A sexually transmitted infection (STI) is caused by a virus, bacteria, fungus, or parasite that can be spread through sexual contact. Several STIs such as HPV and chlamydia, often show no symptoms, so individuals might have an infection without realizing it. When an STI leads to noticeable symptoms, it is called a sexually transmitted disease (STD) (CDC, 2023).
Link to Learning
Teens and young adults are at a higher risk of STIs among sexually active individuals. Knowing the statistics and being informed, along with protecting yourself and getting tested for STIs, is important. Learn more about teen sexual health by watching this video.
Adolescent sexual behaviors other than intercourse have also been studied. According to the CDC, 33 percent of adolescents (aged fifteen to seventeen years) have engaged in oral sex at least once (CDC, 2020). Adolescents may be more likely to engage in oral sex over vaginal intercourse because many do not consider it to “count” as sex or see its potential for leading to STI transmission (Buhi & Goodson, 2007; Strome et al., 2022). From these findings, oral sex is an important component of adolescent sexual experience and should receive attention from parents, educators, and health-care professionals.
The YRBSS also asks teens to report whether they had ever experienced any kind of sexual violence (including unwanted touching and kissing) or been forced to have sex. With an overall level of 11 percent of teens reporting such an experience, 18 percent of female adolescents and 5 percent of male adolescents have experienced some form of sexual violence. A higher proportion of American Indian/Alaskan Native youth (16 percent), multiracial youth (15 percent), and LGBTQ+ youth (22 percent) reported experiencing sexual violence compared to their peers from other racial andethnic groups. Sexual health education that includes defining sexuality and sexual behaviors while also educating adolescents on consequences, healthy relationships, and communication can reduce both the risk factors of early sexual behavior and the risks of sexual violence. For example, education on establishing communication around sexual behavior and respecting the boundaries of others can reduce perpetration of sexual violence.
Sexual Health: Early Intercourse, Adolescent Childbearing, and Sex Education
Psychologists have focused on the individual and environmental factors that predict and explain earlier first sexual intercourse, often defined as younger age at first sexual intercourse. The earlier initial intercourse happens, the greater is the increase in chances for negative health consequences. Research suggests that engaging in sexual intercourse at an early age may increase the likelihood of experiencing negative sexual health outcomes, including reproductive health problems, injuries, pregnancy complications, and socioemotional challenges with future sexual relationships. However, for some individuals, early sexual intercourse has also been associated with positive outcomes like healthier sexual function, including less pain during vaginal penetration, better orgasmic function, and reduced sexual inhibition (Peragine et al., 2022). Some of the positive outcomes of early sexual behavior are more specifically related to sexual stimulation and orgasm, not necessarily intercourse (Peragine et al., 2022). Some research indicates that in evaluating the long-term impacts of first interpersonal sexual experiences, whether the experience was perceived as positive and enjoyable including who you are with may matter more (Peragine et al., 2023).
Psychologists have identified many factors related to early first intercourse. Studies have consistently shown that early sexual intercourse is associated with early pubertal timing (e.g., Mrug et al., 2014; Price & Hyde, 2009), likely because older or similarly maturing adolescents may give extra attention, wanted or unwanted, and even pressure early-maturing adolescents into earlier sexual activity. Early sexual activity is also negatively correlated with school achievement, which means struggling in school or not having strong academic background is a risk factor for early sexual intercourse (Lanari et al., 2020; Price & Hyde, 2009; Wheeler, 2010). Individuals with high levels of aggression and diagnoses of conduct disorders also tend to have sexual intercourse earlier (Fairchild et al., 2019).
Data from U.S. ninth-grade and eleventh-grade children who completed the Minnesota Student Survey show that the relationship between adverse childhood experiences and adolescent sexual risk behaviors and teen pregnancy is strong (Anda et al., 2006; Song & Qian, 2020). A study of teenagers in Brazil found that both personal factors like living in institutions or on the street (versus with families), repeating a school year, and using illegal drugs, as well as family factors like feeling less supported by parents and having more independence from the family, were linked to when teenagers started having sex (Furlanetto et al., 2020).
Parent-child closeness has been shown as a factor in early sexual activity. When parents are distant, adolescents may bond more strongly with their peers, who may serve as positive or negative social influences (Giletta et al., 2021). A qualitative study done in South Africa found that household poverty, family conflict, detached parenting, and lack of sex education all had a negative influence on adolescent well-being and promoted early sexual behaviors (Anyanwu et al., 2020). Taking part in religious activities has also been found to delay first sexual intercourse, especially for males. For instance, religiosity serves as a factor for abstaining from sexual activity among youth in Nigeria (Somefun, 2019).
Thus, family, school, and religious environments can affect teen behaviors and sexual activities. Some protective factors against early sexual initiation include higher socioeconomic status, affiliation with a religious group, sex education, parental monitoring, and knowledge about reproductive health (Lara & Abdo, 2016; Stephenson et al., 2014).
Adolescent Pregnancy and Childbearing
The impact of adolescents bearing their own children is well documented. Adolescents themselves are not finished with development and maturation and are thereby not as well prepared to begin raising another person. For example, a younger age of childbearing can reduce access to educational and socioeconomic advantages later in life (Wolfe et al., 2023). Indeed, adolescent parenthood hinders normative psychological development and is related to poorer psychological functioning (Huang et al., 2013; Mollborn & Morningstar, 2009). Early age of becoming a parent is also associated with a higher risk of poor parenting and intergenerational transmission of unhealthy behavioral risks, such as greater externalizing problems in children of younger caregivers (Lorber & Egeland, 2009). About 75 percent of teenage pregnancies are unplanned (Finer & Zolna, 2016).
Pregnancy and childbirth significantly affect girls’ high school dropout rates. While about 90 percent of females who do not give birth as teenagers graduate from high school, the rate of high school completion for teen parents is 50 percent by the age of twenty-two years (Perper et al., 2010). Teenage mothers therefore attain a lower level of education, have lower earnings, and become more likely to use social welfare services (Gorry, 2019). Teenage mothers are also less likely to attend college and less likely to complete college when they do attend (Diaz & Fiel, 2016). Overall, being a teenage mother often brings emotional, psychological, and social difficulties, although not all teenage mothers have the same experiences (H.H.S., 2023). Having children may motivate some teen parents to complete their education to pursue “a better life” (Harden et al., 2006) and strive for self-sufficiency (Harding et al., 2020).
Research on the experience of teenage fathers is more scarce, for several reasons. Teen mothers are less likely to put fathers’ information on the birth certificate (Landry & Forrest, 1995), and teen males are less likely than older fathers to affirm paternity (Paschal, 2013). Nonetheless, paternal involvement is important, and traits linked with young fatherhood might lead to situations that increase the chances of their offspring engaging in risky sexual behavior and becoming teenage parents themselves (Bamishigbin et al., 2019). For instance, sons of teen fathers were almost twice as likely to become teenage fathers compared to sons of older fathers, even when other risk factors were taken into consideration (Sipsma et al., 2010).
A positive development is that the U.S. teen birth rate (births per 1,000 females aged fifteen to nineteen years) has been declining since 1991. Birth rates dropped from 17.4 per 1,000 females in 2018 to 15.4 in 2020, a record low (Martin et al., 2021). Rates vary significantly among ethnoracial groups, but the downward trend is occurring in all groups. In 2020, American Indian/Alaskan Native adolescent females had the highest birth rate, followed by Hispanic and Black adolescents and then White adolescents (CDC, 2017, 2022) (Figure 9.8).
What accounts for these declines in adolescent childbearing rates? It is likely a combination of factors: greater access to and use of hormonal birth control and condoms, increased access to comprehensive sex education, access to family planning clinics, and an overall decline in sexual activity among teens (e.g., Lindbert et al., 2020). Evidence-based teen pregnancy prevention programs, youth-friendly reproductive health services, and parental and community support can continue to reduce teen pregnancy rates (Goodreau et al., 2020).
Sex Education
Sex education is an important tool not only in encouraging safe and healthy sexual behavior and choices but also in preventing STIs and unplanned pregnancies. In the United States, abstinence-only education, abstinence-plus education, and comprehensive sex education are the three main types of sex education programs:
- Abstinence-only education teaches that people should wait until marriage to engage in sexual intercourse and usually doesn’t include information about using contraception or condoms to prevent pregnancy and STIs. This type of education also may not define what counts as sexual intercourse.
- Abstinence-plus education also promotes waiting until marriage to have sex but provides information about contraception and condoms.
- Comprehensive sex education gives accurate, age-appropriate information on topics like sexual development, behaviors (including abstinence), healthy relationships, life skills, communication, sexual orientation, and gender identity.
Current recommendations are to offer comprehensive sex education to adolescents in schools (Goldfarb & Lieberman, 2021). Several scientific, governmental, and non-profit organizations in the United States have been at the forefront of establishing the core features of a comprehensive sex education curriculum. The National Sexuality Education Standards, first released in 2012, included the following broad topics: healthy relationships, consent, anatomy and physiology, puberty and sexual development, gender identity, sexual orientation, sexual health, and interpersonal violence (Future of Sex Education Initiative, 2020).
How effective is such educational programming? A review of more than 1,500 published studies on all aspects of comprehensive sex education concludes this approach is a resounding success across multiple outcome measures (Goldfarb & Lieberman, 2021). The review highlights the importance of introducing such education as early in adolescence as possible, with some suggesting age-appropriate introduction as early as second or third grade (Lashof-Sullivan, 2015), carefully tailoring information to local needs and developmental appropriateness. Comprehensive sex education, in particular when it includes dating and communication content, has shown the following successful outcomes: reduced adolescent childbearing and STI transmission, improved prevention of and knowledge of dating violence, improved communication in romantic and dating relationships, greater appreciation of sexual diversity, reduced bullying of LGBTQ+ youth, reduced risk of sexual abuse, increased empathy and respect for others, improved positive self-image, a better sense of self-control and safety, increased gender awareness (knowledge and understanding of the concept of gender, the division of roles, and gender equality), and improved overall knowledge and socioemotional skills related to staying safe (Goldfarb & Lieberman, 2021). In short, it is an effective part of the conversation on adolescent sexuality.
Researchers recommend that comprehensive sex education be taught across multiple grades. Before puberty, children should be educated on their own anatomy at a very basic level (e.g., learning the accurate term for the overall external genitalia, such as vulva), know how to assert boundaries about their own boundaries (stay safe), and know how to communicate with a trusted adult if they are at risk or experience harm (Walsh et al., 2018). Additionally, as children approach puberty, in middle childhood and early adolescence, they should get more detail on healthy relationships and be taught in more detail about their own bodies and anatomy (e.g., being able to identify the parts of the external and internal genitalia). For example, multiple studies find that a minority of middle and high school youth can accurately identify the parts of the female and male reproductive system, and many do not have basic knowledge related to STIs and sex (Deshmukh & Chaniana, 2020; Nayoan et al., 2020). In a research study of older students, it was found that around two-thirds were still unable to identify female and male reproductive system parts including the labia and clitoris (Ampatzidis et al., 2019). Finally, by puberty, transparent and open comprehensive sex education that includes discussing of healthy and unhealthy relationships, defining sexual behavior fully, and teaching about safe sex should be provided to all students to improve their physical and socioemotional health and well-being (Goldfarb & Liberman, 2021). Thinking back to your learning in Chapter 2 Genetic, Prenatal, and Perinatal Health, can you identify all the parts of the female and male reproductive systems (Figure 2.12)?
A related concept, sex positivity refers to individuals and communities that focus on openness, nonjudgmental attitudes, independence, and emancipation regarding sexuality and sexual expression (Donaghue, 2015). With a sex-positive approach, open discussions with parents and health-care providers can help educate teens about their sexual desires and behaviors (Kågesten et al., 2016). Having comprehensive sex education and knowledge of reproductive system parts can also increase long-term sexual health and well-being into adulthood (Dienberg et al., 2023).
Consent Culture and Sex Education
Consent culture refers to a societal framework that prioritizes and promotes mutual agreement, respect, and communication in all types of interpersonal interactions, particularly those of a sexual nature. In a consent culture, individuals are encouraged to seek and provide explicit and affirmative consent before engaging in any activity or behavior that may affect others. It emphasizes the understanding that consent must be freely given, reversible, informed, enthusiastic, and specific to each interaction. It aims to create an environment where all individuals feel empowered to assert their boundaries and where consent is valued as a fundamental aspect of healthy relationships and interactions. This shift toward advocating for affirmative consent, often known as “yes-means-yes” approaches, aims to foster open communication between partners and reduce instances of sexual assault (Im et al., 2021; Jozkowski, 2015). These approaches acknowledge affirmative consent as a clear and voluntary agreement, communicated either verbally or nonverbally, among all parties involved in sexual activity (Willis & Jozkowski, 2018).
A study of U.S. high school students found that adolescents’ overall have favorable views toward affirmative consent (Javidi et al., 2021). The study also explored the correlations between attitudes toward affirmative consent and factors such as gender, beliefs about gender roles, and sexual activity status. Females and teens with more egalitarian views on gender roles exhibited more positive attitudes toward affirmative consent compared to males and those with less egalitarian views on gender roles (Javidi et al., 2021). These findings are consistent with previous research that noted college-aged women prefer a more explicit and affirmative consent process than college men (Muehlenhard et al., 2016). Favorable perceptions of affirmative consent could potentially contribute to a reduction in sexual assault incidents among youth by minimizing misunderstandings between partners, providing clarity on legal definitions of sexual misconduct, and fostering sexual interactions characterized by enthusiasm and mutual agreement.
Life Hacks
Sex-Positive Parenting Tips
Creating a sex-positive climate in the home is an important aspect of contemporary parenting (Saady, 2022). The statements, behaviors, and attitudes that make up this kind of parenting don’t mean caregivers are encouraging their teenager to have sex. Rather, they recognize that sex and sexuality are a natural, healthy, and pleasurable part of life, and they set the stage for safe exploration, boundary setting, and open communication. Teaching about consent is a key part of this approach to sexuality.
Like those who adopt the authoritative parenting style, parents who approach their teen’s emerging sexuality in a sex-positive way clearly communicate expectations for their teen regarding sexual behavior. When these expectations are not met, sex-positive parents communicate their disappointment and reinforce the agreed-upon parameters for future behavior. Shame and guilt are actively avoided.
Here are some other sex-positive parenting tips and practices:
- Use medically correct terms for sexual body parts and acts from early childhood onward.
- Discuss options for birth control and STI prevention.
- Discuss masturbation in healthy terms, including appropriate places to do it.
- Focus on the functionality of body parts rather than on their appearance.
- Model healthy sexuality with parents’ own adult partners, including showing affectionate and romantic aspects of sex like hand-holding, kissing, and cuddling.
- Have periodic and ongoing age-appropriate discussions about sex, tailored to the teen’s current knowledge and experiences.
In these ways, parents acknowledge adolescents’ emerging sexuality and take an active part in setting their child up for positive decisions and experiences around sexuality.
References
Aghaee, S., Deardorff, J., Greenspan, L. C., Quesenberry, C. P., Jr, Kushi, L. H., & Kubo, A. (2020). Early life household intactness and timing of pubertal onset in girls: A prospective cohort study. BMC Pediatrics, 20(1), 464. https://doi.org/10.1186/s12887-020-02345-w
Anda, R. F., Felitti, V. J., Bremner, J. D., Walker, J. D., Whitfield, C. H., Perry, B. D., ... & Giles, W. H. (2006). The enduring effects of abuse and related adverse experiences in childhood: A convergence of evidence from neurobiology and epidemiology. European archives of psychiatry and clinical neuroscience, 256, 174-186.
Ampatzidis, G., Georgakopoulou, D., & Kapsi, G. (2019). Clitoris, the unknown: what do postgraduate students of educational sciences know about reproductive physiology and anatomy? Journal of Biological Education, 55(3), 254–263. https://doi.org/10.1080/00219266.2019.1679658
Anyanwu, F. C., Akinsola, H. A., Tugli, A. K., & Obisie-Nmehielle, N. (2020). A qualitative assessment of the influence of family dynamics on adolescents’ sexual risk behaviour in a migration-affected community. International journal of qualitative studies on health and well-being, 15(1), 1717322.
American Psychological Association (APA). (2023). Transgender people, gender identity and gender expression. Retrieved on March 15, 2024 from https://www.apa.org/topics/lgbtq/transgender-people-gender-identity-gender-expression
Arım, R. G., Tramonte, L., Shapka, J. D., Susan Dahinten, V., & Douglas Willms, J. (2011). The family antecedents and the subsequent outcomes of early puberty. Journal of Youth and Adolescence, 40, 1423-1435.
Bamishigbin Jr, O. N., Schetter, C. D., & Stanton, A. L. (2019). The antecedents and consequences of adolescent fatherhood: A systematic review. Social Science & Medicine, 232, 106-119.
Bleakley, A., Khurana, A., Hennessy, M., & Ellithorpe, M. (2018). How Patterns of Learning About Sexual Information Among Adolescents Are Related to Sexual Behaviors. Perspectives on sexual and reproductive health, 50(1), 15–23. https://doi.org/10.1363/psrh.12053
Buhi ER, Goodson P. Predictors of adolescent sexual behavior and intention: a theory-guided systematic review. J Adolesc Health. 2007 Jan;40(1):4-21.
CDC. (2020, February 10). Teen substance use & risks. Retrieved February 19, 2024 from https://www.cdc.gov/healthyyouth/factsheets/substance_use_fact_sheet-basic.htm
CDC. (2023, July 7). Sexually Transmitted Diseases (STDs): Diseases & Related Conditions. Retrieved on March 15, 2024 from https://www.cdc.gov/std/general/default.htm
Deshmukh, D. D., & Chaniana, S. S. (2020). Knowledge about sexual and reproductive health in adolescent school-going children of 8th, 9th, and 10th standards. Journal of psychosexual Health, 2(1), 56–62. https://doi.org/10.1177/2631831819898916
Diaz CJ, Fiel JE. The Effect(s) of Teen Pregnancy: Reconciling Theory, Methods, and Findings. Demography. 2016 Feb;53(1):85-116. Donaghue, C. (2015). Sex outside the lines: Authentic sexuality in a sexually dysfunctional culture. Dallas, TX: Benbella Books.
Dienberg, M. F., Oschatz, T., Kosman, E., & Klein, V. (2023). Does clitoral knowledge translate into orgasm? The interplay between clitoral knowledge, gendered sexual scripts, and orgasm experience. Journal of Sex & Marital Therapy, 49(5), 484–496. https://doi.org/10.1080/0092623X.2022.2147112
Fairchild, G., Hawes, D. J., Frick, P. J., Copeland, W. E., Odgers, C. L., Franke, B., ... & De Brito, S. A. (2019). Conduct disorder. Nature Reviews Disease Primers, 5(1), 43.
Farello, G., Altieri, C., Cutini, M., Pozzobon, G., & Verrotti, A. (2019). Review of the literature on current changes in the timing of pubertal development and the incomplete forms of early puberty. Frontiers in pediatrics, 7, 147. https://doi.org/10.3389/fped.2019.00147
Finer LB, Zolna MR. Declines in Unintended Pregnancy in the United States, 2008-2011. N Engl J Med. 2016 Mar 3;374(9):843-52. doi: 10.1056
Frankel, L. (2002). “I’ve never thought about it”: Contradictions and taboos surrounding American males’ experiences of first ejaculation (semenarche). The Journal of Men’s Studies, 11(1), 37–54. https://doi.org/10.3149/jms.1101.37
Furlanetto, M. F., Ghedin, D. M., Gonçalves, T. R., & Marin, A. H. (2020). Individual and contextual factors associated with sexual initiation among adolescents. Psicologia: Reflexão e Crítica, 32.
Future of Sex Education Initiative (2020). https://www.futureofsexed.org/
Gaydosh, L., Belsky, D. W., Domingue, B. W., Boardman, J. D., & Harris, K. M. (2018). Father absence and accelerated reproductive development in non-Hispanic white women in the United States. Demography, 55, 1245-1267.
Giletta, M., Choukas-Bradley, S., Maes, M., Linthicum, K. P., Card, N. A., & Prinstein, M. J. (2021). A meta-analysis of longitudinal peer influence effects in childhood and adolescence. Psychological Bulletin, 147(7), 719–747. https://doi.org/10.1037/bul0000329
Goldfarb ES, Lieberman LD. Three decades of research: the case for comprehensive sex education. J Adolesc Health. 2021;68(1):13–27.
Goodreau, S. M., Pollock, E. D., Wang, L., Li, J., Aslam, M. V., Katz, D. A., ... & Rosenberg, E. S. (2022). Declines in Pregnancies among US Adolescents from 2007 to 2017: Behavioral Contributors to the Trend. Journal of pediatric and adolescent gynecology, 35(6), 676-684.
Gorry D. Heterogeneous Consequences of Teenage Childbearing. Demography. 2019 Dec;56(6):2147-2168.
Graber, J. A. (2013). Pubertal timing and the development of psychopathology in adolescence and beyond. Hormones and behavior, 64(2), 262–269. https://doi.org/10.1016/j.yhbeh.2013.04.003
Hall, W. J., and Rodgers, G. K. (2019). Teachers’ attitudes toward homosexuality and the lesbian, gay, bisexual, and queer community in the United States. Soc. Psychol. Educ. 22, 23–41. doi: 10.1007/s11218-018-9463-9
Harden, A., Brunton, G., Fletcher, A., Oakley, A., Burchett, H., & Backhans, M. (2006). Young people, pregnancy and social exclusion: A systematic synthesis of research evidence to identify effective, appropriate and promising approaches for prevention and support. London, UK: EPPI-Centre.
Harding, J. F., Knab, J., Zief, S., Kelly, K., & McCallum, D. (2020). A systematic review of programs to promote aspects of teen parents’ self-sufficiency: Supporting educational outcomes and healthy birth spacing. Maternal and Child Health Journal, 24, 84-104.
Harper, C. R., Steiner, R. J., Lowry, R., Hufstetler, S., & Dittus, P. J. (2018). Variability in condom use trends by sexual risk behaviors: Findings from the 2003–2015 National Youth Risk Behavior Surveys. Sexually transmitted diseases, 45(6), 400-405.
Health and Human Services (2023). Trends in teen pregnancy and childbearing. https://opa.hhs.gov/adolescent-health/reproductive-health-and-teen-pregnancy/trends-teen-pregnancy-and-childbearing
Huang, C. Y., Costeines, J., Kaufman, J. S., & Ayala, C. (2014). Parenting stress, social support, and depression for ethnic minority adolescent mothers: Impact on child development. Journal of child and family studies, 23, 255–262. https://doi.org/10.1007/s10826-013-9807-1
Im, J., Dimond, J., Berton, M., Lee, U., Mustelier, K., Ackerman, M. S., & Gilbert, E. (2021, May). Yes: Affirmative consent as a theoretical framework for understanding and imagining social platforms. In Proceedings of the 2021 CHI conference on human factors in computing systems (pp. 1-18).
Javidi, H., Maheux, A. J., Widman, L., Kamke, K., Choukas-Bradley, S., & Peterson, Z. D. (2020). Understanding Adolescents’ Attitudes Toward Affirmative Consent. Journal of sex research, 57(9), 1100–1107. https://doi.org/10.1080/00224499.2019.1711009
Jozkowski, K. N. (2015). “Yes means yes”? Sexual consent policy and college students. Change: The Magazine of Higher Learning, 47(2), 16-23.
Kågesten, A., Gibbs, S., Blum, R. W., Moreau, C., Chandra-Mouli, V., Herbert, A., & Amin, A. (2016). Understanding factors that shape gender attitudes in early adolescence globally: A mixed-methods systematic review. PloS One, 11, 1–36.
Kar, S. K., Choudhury, A., & Singh, A. P. (2015). Understanding normal development of adolescent sexuality: A bumpy ride. Journal of human reproductive sciences, 8(2), 70-74.
Keenan, K., Culbert, K. M., Grimm, K. J., Hipwell, A. E., & Stepp, S. D. (2014). Timing and tempo: Exploring the complex association between pubertal development and depression in African American and European American girls. Journal of Abnormal Psychology, 123(4), 725–736. https://doi.org/10.1037/a0038003
Klopack, E. T., Simons, R. L., & Simons, L. G. (2020). Puberty and girls' delinquency: A test of competing models explaining the relationship between pubertal development and delinquent behavior. Justice Quarterly, 37(1), 25–52. https://doi.org/10.1080/07418825.2018.1472291
Klopack, E. T., Sutton, T. E., Simons, R. L., & Simons, L. G. (2020). Disentangling the effects of boys' pubertal timing: The importance of social context. Journal of Youth and Adolescence, 49(7), 1393–1405. https://doi.org/10.1007/s10964-019-01141-9
Lanari, D., Mangiavacchi, L., & Pasqualini, M. (2020). Adolescent sexual behaviour and academic performance of Italian students. Genus, 76(1), 1-18.
Landry, D. J., & Forrest, J. D. (1995). How old are US fathers?. Family planning perspectives, 159-165.
Lara, L. A., & Abdo, C. H. (2016). Age at time of initial sexual intercourse and health of adolescent girls. Journal of Pediatric and Adolescent Gynecology, 29(5), 417-423.
Lashof-Sullivan, M. (2015). Sex education in schools. GEO. J. GENDER & L., 16, 263-264.
Leone, T., & Brown, L. J. (2020). Timing and determinants of age at menarche in low-income and middle-income countries. BMJ Global Health, 5(12), e003689. https://doi.org/10.1136/bmjgh-2020-003689
Lindberg, L. D., Scott, R. H., Desai, S., & Pleasure, Z. H. (2021). Comparability of estimates and trends in adolescent sexual and contraceptive behaviors from two national surveys: National Survey of Family Growth and the Youth Risk Behavior Survey. Plos one, 16(7), e0253262.
Lorber, M. F., & Egeland, B. (2009). Infancy parenting and externalizing psychopathology from childhood through adulthood: developmental trends. Developmental psychology, 45(4), 909–912. https://doi.org/10.1037/a0015675
Marshal MP, Dietz LJ, Friedman MS, Stall R, Smith HA. 2011. Suicidality and depression disparities between sexual minority and heterosexual youth: a meta-analytic review. J. Adolesc. Health 49:115–23
Mercer, J. (2021). Developmental changes in children and adolescents: Relevance for parental alienation discussions. In Challenging parental alienation: New directions for professionals and parents.
Mollborn, S., & Morningstar, E. (2009). Investigating the relationship between teenage childbearing and psychological distress using longitudinal evidence. Journal of health and social behavior, 50(3), 310–326. https://doi.org/10.1177/002214650905000305
Mrug S, Elliott M, Gilliland MJ, et al. Positive Parenting and Early Puberty in Girls: Protective Effects Against Aggressive Behavior. Arch Pediatr Adolesc Med. 2008;162(8):781–786. doi:10.1001/archpedi.162.8.781
Mrug, S., Elliott, M. N., Davies, S., Tortolero, S. R., Cuccaro, P., & Schuster, M. A. (2014). Early puberty, negative peer influence, and problem behaviors in adolescent girls. Pediatrics, 133(1), 7-14.
Muehlenhard, C. L., Humphreys, T. P., Jozkowski, K. N., & Peterson, Z. D. (2016). The complexities of sexual consent among college students: A conceptual and empirical review. The Journal of Sex Research, 53(4-5), 457-487.
Mustanski, B., Kuper, L., and Greene, G. J. (2014). “Development of sexual orientation and identity. In APA handbook of sexuality and psychology,” in Person-Based Approaches. Vol. 1. eds. D. L. Tolman and L. M. Diamond (United States: American Psychological Association), 597–628.
Najman, J. M., Hayatbakhsh, M. R., McGee, T. R., Bor, W., O’Callaghan, M. J., & Williams, G. M. (2009). The impact of puberty on aggression/delinquency: Adolescence to young adulthood. Australian and New Zealand Journal of Criminology, 42(3), 369–386.
Nayoan, C. R., Hoban, E., & Williams, J. (2020). How young female adolescents understand their pubertal body changes and reproductive system. International Journal of Adolescence and Youth, 25(1), 872–881. https://doi.org/10.1080/02673843.2020.1767662
NIH. (2024). Puberty and precocious puberty. https://www.nichd.nih.gov/health/topics/factsheets/puberty
Osinubi, A., Lewis-de Los Angeles, C. P., Poitevien, P., & Topor, L. S. (2022). Are black girls exhibiting puberty earlier? Examining implications of race-based guidelines. Pediatrics, 150(2), e2021055595.
Paschal, A. M. (2013). Voices of African American teen fathers: I’m doing what I got to do. Routledge.
Peragine, D. E., Skorska, M. N., Maxwell, J. A., Impett, E. A., & VanderLaan, D. P. (2022). The Risks and Benefits of Being “Early to Bed”: Toward a Broader Understanding of Age at Sexual Debut and Sexual Health in Adulthood. The Journal of Sexual Medicine, 19(9), 1343-1358.
Peragine, D.E., Kim, J.J., Maxwell, J.A. et al. (2023). Not Who You Are, But Who You Are With: Re-examining Women’s Less Satisfying Sexual Debuts. Arch Sex Behav 52, 3405–3427. https://doi.org/10.1007/s10508-023-02667-7
Perper K, Peterson K, Manlove J. Diploma Attainment Among Teen Mothers. Child Trends, Fact Sheet Publication #2010-01: Washington, DC: Child Trends; 2010.
Price, M.N., Hyde, J.S. When Two Isn’t Better Than One: Predictors of Early Sexual Activity in Adolescence Using a Cumulative Risk Model. J Youth Adolescence 38, 1059–1071 (2009).
Ragsdale, K., Bersamin, M. M., Schwartz, S. J., Zamboanga, B. L., Kerrick, M. R., & Grube, J. W. (2014). Development of sexual expectancies among adolescents: Contributions by parents, peers and the media. The Journal of Sex Research, 51(5), 551-560.
Reis LF, Surkan PJ, Atkins K, Garcia-Cerde R, Sanchez ZM. Risk Factors for Early Sexual Intercourse in Adolescence: A Systematic Review of Cohort Studies. Child Psychiatry Hum Dev. 2023 Mar 25:1–14.
Rosario, M., Corliss, H. L., Everett, B. G., Reisner, S. L., Austin, S. B., Buchting, F. O., & Birkett, M. (2014). Sexual orientation disparities in cancer-related risk behaviors of tobacco, alcohol, sexual behaviors, and diet and physical activity: pooled Youth Risk Behavior Surveys. American journal of public health, 104(2), 245-254.
Russell, S. T., & Fish, J. N. (2016). Mental health in lesbian, gay, bisexual, and transgender (LGBT) youth. Annual review of clinical psychology, 12, 465-487.
Ryan, R. M., & Deci, E. L. (2017). Self-determination theory: Basic psychological needs in motivation, development, and wellness. Guilford publications.
Saady, M. (2022). Sex-Positive Parenting: What You Need to Know. Parents Together.
Saewyc, E. M. (2011). Research on adolescent sexual orientation: Development, health disparities, stigma, and resilience. Journal of research on adolescence, 21(1), 256-272.
Salerno JP, Williams ND, Gattamorta KA. LGBTQ populations: psychologically vulnerable communities in the COVID-19 pandemic. Psychol Trauma. 2020;12(suppl 1):S239–S242.
Sipsma, H., Biello, K. B., Cole-Lewis, H., & Kershaw, T. (2010). Like father, like son: The intergenerational cycle of adolescent fatherhood. American journal of public health, 100(3), 517-524.
Somefun, O. D. (2019). Religiosity and sexual abstinence among Nigerian youths: does parent religion matter?. BMC public health, 19, 1-11.
Sommer, M., Likindikoki, S., & Kaaya, S. (2014). Tanzanian adolescent boys’ transitions through puberty: the importance of context. American journal of public health, 104(12), 2290-2297.
Song, W., & Qian, X. (2020). Adverse Childhood Experiences and Teen Sexual Behaviors: The Role of Self-Regulation and School-Related Factors. Journal of school health, 90(11), 830-841.
Sooki, Z., Shariati, M., Chaman, R., Khosravi, A., Effatpanah, M., & Keramat, A. (2016). The role of mother in informing girls about puberty: A meta-analysis study. Nursing and Midwifery Studies, 5(1), e30360. https://doi.org/10.17795/nmsjournal30360
Stephenson, R., Simon, C., & Finneran, C. (2014). Community factors shaping early age at first sex among adolescents in Burkina Faso, Ghana, Malawi, and Uganda. Journal of health, population, and nutrition, 32(2), 161.
Strome, A., Waselewski, M., & Chang, T. (2022). Youths’ knowledge and perceptions of health risks associated with unprotected oral sex. The Annals of Family Medicine, 20(1), 72-76.
Torvik, F. A., Flatø, M., McAdams, T. A., Colman, I., Silventoinen, K., & Stoltenberg, C. (2021). Early puberty is associated with higher academic achievement in boys and girls and partially explains academic sex differences. Journal of Adolescent Health, 69(3), 503-510.
Thoma, B. C., Huebner, D. M., & Rullo, J. E. (2013). Unseen risks: HIV-related risk behaviors among ethnically diverse sexual minority adolescent females. AIDS education and prevention, 25(6), 535-541.
Scott R. H., Wellings K., & Lindberg L. Adolescent Sexual Activity, Contraceptive Use, and Pregnancy in Britain and the U.S.: A Multidecade Comparison. Journal of Adolescent Health. 2020 May 66(5):582-588
Walsh, K., Zwi, K., Woolfenden, S., & Shlonsky, A. (2018). School-based education programs for the prevention of child sexual abuse: A Cochrane systematic review and meta-analysis. Research on social work practice, 28(1), 33–55. https://doi.org/10.1177/1049731515619705
Warner, J. (2017). The unequal toll of toxic stress. Retrieved from https://www.americanprogress.org/article/unequal-toll-toxic-stress/
Wheeler, S. B. (2010). Effects of self-esteem and academic performance on adolescent decision-making: an examination of early sexual intercourse and illegal substance use. Journal of Adolescent Health, 47(6), 582-590.
Willis, M., & Jozkowski, K. N. (2018). Barriers to the success of affirmative consent initiatives: An application of the social ecological model. American Journal of Sexuality Education, 13(3), 324-336.
Wolfe, J. D., Thomeer, M. B., & Reczek, R. (2023). Age at first birth and women's midlife health: Cohort and race differences across the 20th century. Social Science & Medicine, 331, 116097. https://doi.org/10.1016/j.socscimed.2023.116097