Integrating hormones and other biological factors into a developmental systems model of adolescent female sexuality

The Measurement of Female Early Adolescent Sexual Desire

We used the developmental systems model to deduce a definition of female early adolescent sexual desire. We evaluated a measure of this phenomenon with a secondary analysis of data from a randomized group sexual health intervention trial involving low-income, English-speaking, seventh grade Latinas enrolled in a Miami-Dade County public school (n = 542). As part of this study, girls completed a four-item early adolescent sexual desire (EASD) measure. Study findings supported internal consistency (Cronbach's alpha = .81 to .82) and stability over a 1-month period (r = .74). Developmental sensitivity was supported by a decline in stability over 12- (r = .66) and 24-month periods (r = .56). Validity was supported by correlations with puberty changes, sexual intentions, sexting, and sexual behavior, and hypothesized mean differences associated with dating and preference for shoes culturally associated with female sexual attractiveness (p < .01). Research implications include validation work with other ethnic/racial groups and using the EASD as a starting point for a measurement continuum tracking development of sexual desire across adolescence and into adulthood. Directions for future research also include measuring the development of sexual desire in boys and transgendered youth across adolescence and into adulthood.

Dynamic Change Between Intimate Partner Violence and Contraceptive Use Over Time in Young Adult Men's and Women's Relationships

The negative association between intimate partner violence (IPV) and contraceptive use is well established, but much of this research treats the association as static (e.g., similar across all relationships over development or time). Such studies do not account for individual development of sexual and romantic relationship mental, social, and behavioral well-being, which relate to contraceptive use. These studies are also predominantly woman-focused; such work could be complemented by examining men's associations. The current study examined how associations between sexual and physical IPV and consistent condom and birth control (BC) use changed across up to seven sequential relationships in young adulthood over a five-year period within a nationally representative sample. Results indicated that physical IPV-contraception associations were significant only across earliest or latest relationships. Sexual IPV-contraception associations were significant over more relationships but often changed in valence (negative to positive). There were few significant differences in these associations between men and women. Developmental context (e.g., prior relationship/IPV experience) may be important when considering IPV-contraception associations. In addition, although the IPV-contraception association does not appear to be a unique problem for women, research needs to explore how underlying mechanisms explaining this association may be a result of gendered and nongendered contexts.

Implications of Pubertal Timing for Romantic Relationship Quality Among Heterosexual and Sexual Minority Young Adults

PURPOSE

Relative to on-time or late-maturing peers, girls who begin puberty early typically begin romantic and sexual experiences earlier; however, advanced pubertal status does not necessarily coincide with commensurate interpersonal skills necessary for healthy romantic relationships. Research is limited on the long-term implications of early puberty for relationship quality, and virtually nothing is known about the social implications of early timing for sexual minority females.

METHODS

Using linear regression, we examine longitudinal associations between two measures of girls' pubertal timing (self-perceived timing and menarcheal age) and romantic relationship quality in young adulthood, stratified by sexual orientation, among 5,568 females in waves I and IV of the National Longitudinal Study of Adolescent to Adult Health. We also examine whether identified associations are mediated by parent-adolescent relationship quality.

RESULTS

Among sexual minorities, early self-perceived pubertal timing was associated with lower adult romantic relationship quality compared with on-time maturers (β = -2.32; standard error = 1.44; p = .05); this association was mediated by parent-adolescent relationship quality. Among heterosexuals, girls experiencing menarche before age 12 (early maturers) reported lower adult relationship quality compared to on-time maturers (β = -.43; standard error = .22; p = .03); parent-adolescent relationship quality did not mediate this association.

CONCLUSIONS

Early maturation is associated with lower romantic relationship quality in young adulthood. However, evidence of the association varies by measure of pubertal timing, and the processes by which pubertal timing is linked to later relationship quality may be different for sexual minority and heterosexual females. Potential explanations and public health implications are discussed.

A Two-Hit Model of Autism: Adolescence as the Second Hit

Adolescence brings dramatic changes in behavior and neural organization. Unfortunately, for some 30% of individuals with autism, there is marked decline in adaptive functioning during adolescence. We propose a two-hit model of autism. First, early perturbations in neural development function as a "first hit" that sets up a neural system that is "built to fail" in the face of a second hit. Second, the confluence of pubertal hormones, neural reorganization, and increasing social demands during adolescence provides the "second hit" that interferes with the ability to transition into adult social roles and levels of adaptive functioning. In support of this model, we review evidence about adolescent-specific neural and behavioral development in autism. We conclude with predictions and recommendations for empirical investigation about several domains in which developmental trajectories for individuals with autism may be uniquely deterred in adolescence.

The evolving sexual health paradigm: transforming definitions into sexual health practices

Sexual health is an evolving paradigm that integrates a positive approach to sexuality with existing public health policy and practice for reducing the burdens of sexually transmitted infections, including those due to HIV. The sexual health paradigm rests in commitment to sexual rights, sexual knowledge, sexual choice, and sexual pleasure, as well as key elements of sexuality addressed by sexual desire, sexual arousal, and sexual function, and sexual behaviors. The sexual health paradigm offers new approaches to supporting general health and well being while reducing the burdens of sexual diseases and their consequences.

Sexual self-concept: testing a hypothetical model for men and women

One theoretical concept receiving modest attention in contemporary sex research is the sexual self-concept (SSC). However, a lack of cohesion within this research has culminated in a collection of SSC models which overlap one another but which are not exactly the same. Therefore, a unified conceptual model of SSC needs to be established. In addition, little research has examined potential differences between genders in SSC, as most SSC research has focused on women. Using Buzwell and Rosenthal's 1996 sexual selves model as a theoretical basis, a six-factor higher-order latent SSC model was tested using confirmatory factor analysis. Lower-order factors for this model included multidimensional sexual self-esteem and sexual self-efficacy factors, as well as unidimensional arousal, anxiety, exploration, and commitment factors. A five-factor latent model (after removing the commitment and the resistance sexual self-efficacy factors) was the best-fitting model. This model was then tested for measurement and structural invariance between genders. Results indicated that while the measurement of SSC was similar between men and women, structural invariance did not hold, as men had a significantly higher latent SSC score compared to women. These findings have important implications for sexual self-concept research, as well as contributing to better understanding of human sexuality.

Genetic influences on adolescent sexual behavior: Why genes matter for environmentally oriented researchers

There are dramatic individual differences among adolescents in how and when they become sexually active adults, and early sexual activity is frequently cited as a cause of concern for scientists, policymakers, and the general public. Understanding the causes and developmental impact of adolescent sexual activity can be furthered by considering genes as a source of individual differences. Quantitative behavioral genetics (i.e., twin and family studies) and candidate gene association studies now provide clear evidence for the genetic underpinnings of individual differences in adolescent sexual behavior and related phenotypes. Genetic influences on sexual behavior may operate through a variety of direct and indirect mechanisms, including pubertal development, testosterone levels, and dopaminergic systems. Genetic differences may be systematically associated with exposure to environments that are commonly treated as causes of sexual behavior (gene-environment correlation). Possible gene-environment correlations pose a serious challenge for interpreting the results of much behavioral research. Multivariate, genetically informed research on adolescent sexual behavior compares twins and family members as a form of quasi experiment: How do twins who differ in their sexual experiences differ in their later development? The small but growing body of genetically informed research has already challenged dominant assumptions regarding the etiology and sequelae of adolescent sexual behavior, with some studies indicating possible positive effects of teenage sexuality. Studies of Gene × Environment interaction may further elucidate the mechanisms by which genes and environments combine to shape the development of sexual behavior and its psychosocial consequences. Overall, the existence of heritable variation in adolescent sexual behavior has profound implications for environmentally oriented theory and research.

Puberty and adolescent sexuality

This article is part of a Special Issue "Puberty and Adolescence". Sexuality emerges as a major developmental element of puberty and the adolescent years that follow. However, connecting the sexuality that emerges with puberty and elements of adult sexuality is difficult because much adolescent sexuality research addresses the transition to partnered sexual behaviors (primarily coitus) and consequences such as unplanned pregnancy and sexually transmitted infections. This review proposes a framework of an expanded understanding of puberty and adolescent sexuality from the perspective of four hallmarks of adult sexuality: sexual desire; sexual arousal; sexual behaviors; and, sexual function. This approach thus addresses important gaps in understanding of the ontogeny of sex and the continuum of sexuality development from adolescence through the adult lifespan.

Dual use of long-acting reversible contraceptives and condoms among adolescents

Unintended pregnancy and sexually transmitted infections (STI) continue to be significant public health problems, and adolescents are disproportionately affected by both. With national attention and funding directed toward adolescent pregnancy prevention, promotion of long-acting reversible contraceptive (LARC) use among adolescents is both timely and relevant. However, LARCs provide no protection against STIs, requiring dual-method use of both LARC and barrier methods, most commonly the male latex condom, to address these issues simultaneously. Rates of both LARC and dual-method contraception are low in the United States, but have increased in recent years. Dual-method contraception is highest among younger women and adolescents with multiple or new sex partners. Consistent condom use remains a major barrier to dual-method use, as it necessitates admission of STI risk by both partners, and use is dependent upon two decision-makers rather than a single contraceptive user. Promoting the initiation and maintenance of LARC and condom use across multiple partnered sexual encounters requires understanding of individual, dyadic, and social influences. Successful maintenance of contraceptive and STI prevention behaviors requires individualized, longitudinal reinforcement, and social supports, but can ultimately reduce the burden of unintended pregnancy and STI among adolescents.

Pubertal timing and early sexual intercourse in the offspring of teenage mothers

Early puberty is associated with stressful family environments, early sexual intercourse, and teenage pregnancy. We examined pubertal timing and sexual debut among the 14-year-old offspring of teenage mothers. Mothers (71% Black, 29% White) were recruited as pregnant teenagers (12-18 years old). Data were collected during pregnancy and when offspring were 6, 10 and 14 years old (n = 318). Adolescents (50% male) compared the timing of their pubertal maturation to same-sex peers. There was a significant 3-way interaction effect of race, sex, and pubertal timing on sexual debut (n = 305). This effect remained significant in a model controlling for maternal age at first intercourse, substance use, exposure to trauma, authoritative parenting, and peer sexual activity (n = 255). Early maturation was associated with early sex in daughters, and may be one pathway for the inter-generational transfer of risk for teenage pregnancy among daughters of teenage mothers.

The association of sexual interest and sexual behaviors among adolescent women: a daily diary perspective

Theoretical and empirical linkages of adult women's sexual interest and sexual behaviors are relatively well-established, but few data address similar issues in adolescent women. This paper reviews data from published reports of associations of adolescent women's sexual interest and various sexual behaviors. All of the papers reported data collected from a single longitudinal cohort of young women. The primary source of data collection was daily diaries, allowing close temporal pairing of sexual interest with sexual behaviors. Young women's sexual interest on a given day was consistently and independently associated with sexual activity on that day, whether the behavior was first lifetime coitus, coitus, fellatio, cunnilingus, anal intercourse, or coitus during menses. We also found no evidence of influence of hormonal contraceptives on young women's sexual interest. Taken together, these data demonstrate the relevance of sexual interest as a key factor in young women's sexuality and sexual behavior.