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. Author manuscript; available in PMC: 2015 Aug 1.
Published in final edited form as: J Sex Med. 2014 Jun 3;11(8):1982–1990. doi: 10.1111/jsm.12607

Stress symptoms and the frequency of sexual intercourse among young women

Kelli Stidham Hall 1, Yasamin Kusunoki 2, Heather Gatny 3, Jennifer Barber 4
PMCID: PMC4115031  NIHMSID: NIHMS595158  PMID: 24894425

Abstract

Introduction

We have previously documented the relationships between stress and depression symptoms and adolescent women's nonuse and misuse of condoms and other contraceptive methods and on their unintended pregnancy rates.

Aim

Here, we examine relationships between mental health symptoms and another understudied adolescent reproductive health behavior - frequency of sexual intercourse.

Main Outcome Measure

Our outcome was weekly sexual intercourse activity.

Methods

We used panel data from a longitudinal, population-based cohort study of 992 women ages 18–20. Weekly journals measured sociodemographic, relationship, reproductive, and mental health characteristics, sexual and contraceptive behaviors, and pregnancy. We examined 27,130 surveys from 952 women during the first study year. Predictors of weekly sexual intercourse were moderate/severe stress (PSS-4) and depression (CESD-5) symptoms measured at baseline. Multi-level, mixed-effects logistic regression models estimated the relationships between stress and depression symptoms and the weekly odds of sexual intercourse while adjusting covariate fixed effects and random woman effects.

Results

Nearly a quarter of the sample had moderate/severe stress (23%) and depression (24%) symptoms at baseline. Women reported sexual intercourse in 36% of weeks. Proportions of sexually active weeks were higher among women with stress (43%) and depression (40%) compared to those without symptoms (35% and 35%, respectively, p-values<0.001). Controlling for covariates, women with baseline stress symptoms had 1.6 times higher weekly odds of sexual intercourse compared to women without stress (aOR 1.6, CI 1.1–2.5, p=0.04). Depression symptoms were not associated with sexual intercourse frequency in adjusted models.

Conclusions

Stress symptoms were positively associated with sexual intercourse frequency among these young women. Research and practice efforts are needed to identify effective sexual health promotion and risk reduction strategies, including contraceptive education and counseling, in the context of mental health symptoms and unintended pregnancy.

Keywords: stress, mental health, sexual intercourse, unintended pregnancy, sexual health

Introduction

Researchers have documented the contribution of mental health conditions to adverse maternal child health outcomes [15]. Depression, anxiety, stress, and related conditions, which are prevalent among reproductive-aged women, have been linked with perinatal and postpartum sequelae, including maternal and infant morbidity and mortality, obstetrical complications, pre-term and still birth, low birth weight, and antepartum and postpartum depression [15]. Less research, though, has focused on the role of mental health symptoms in a broader range of sexual and reproductive health outcomes, especially for young women. Adolescence is a transitional period of biological, psychological, and social development that is impacted by mental health, and it is a time when sexual behaviors and reproductive outcomes like unintended pregnancy have significant implications for women's health and life trajectories [6]. Thus, relationships between common mental health symptoms, unintended pregnancy and the pathways to unintended pregnancy warrant attention but have been understudied in adolescent sexual and reproductive health research [79].

There are two primary behavioral mechanisms by which mental health could influence young women's risk of unintended pregnancy: contraception and sex. First, symptoms of stress and depression may compromise a woman's ability to perform health behavioral routines and medical regimens [1015], which has implications for effective contraceptive use. Indeed, emerging research, including our own, has identified associations between mental health and contraceptive behaviors [1621]. In our previous analyses of data from a population-based longitudinal cohort study of nearly 1,000 adolescent women, we reported the effects of stress and depression symptoms on elevated rates of unintended pregnancy and nonuse and inconsistent use of condoms and other effective methods of contraceptive (e.g. hormonal and long-acting methods) [9,16,17].

Second, mental health could also influence young women's sexual behavior, including frequency of sexual intercourse, as an additional or competing pathway to unintended pregnancy. Among older populations, studies have shown that mental health and perceived wellbeing are positively correlated with sexual intercourse and sexual pleasure among women and men in later decades of life [2228]. From a health promotion perspective, women with mental health symptoms could engage in sexual activity to cope with or alleviate their stress or sadness [2933]. Alternatively, decreased motivation or excessive worry (symptoms common to depression and stress) could impede a woman's desire for sex, resulting in a negative effect on sexual interest, arousal, intercourse frequency and then subsequent unintended pregnancy risk over time [3436]. The relationships between depression and stress and libido and sexual dysfunction among middle- and older-aged women and men, particularly those with chronic disease, have been documented [3640].

Studies of young women's mental health and sexual behavior have largely taken a risk reduction approach, focusing on the links between depression and “risky” sex, including earlier age at coitarche, more sexual partners, unprotected sex, sexually transmitted infection acquisition, non-consensual sex, and sex while under the influence of alcohol and drugs [4145]. Little research has considered the potential negative and positive associations between mental health symptoms and frequency of sexual intercourse during adolescence, especially in the context of unintended pregnancy.

Study Aim

We investigated the relationships between stress and depression symptoms and the weekly probability of sexual intercourse among a population-based cohort of adolescent women desiring to avoid pregnancy.

Methods

Sample and Design

We have described the study sample and design in other reports [9,16,17]. In brief, we draw upon data from 992 young women aged 18 to 20 in a longitudinal population-based cohort study. Women were randomly sampled from a racial/ethnically and socioeconomically diverse county in the Midwestern United States between March 2008 and March 2009 using names and contact information from state driver's license and personal identification card registries. We contacted eligible women (ages 18–20 and a county resident) by mail or in-person with an invitation to participate. The University of Michigan's Institutional Review Board approved this study.

Eligible women who agreed to participate were informed and provided consent and completed a 60-minute survey with our trained interviewer. The survey interview collected sociodemographics; relationship characteristics; reproductive attitudes, beliefs and intentions; sexual and contraceptive histories; and mental health symptoms. We then invited women to participate in the 2.5-year weekly survey study. The weekly surveys measured sexual and contraceptive behaviors, as well as pregnancy status. Surveys were completed online, or by phone if internet access was unavailable during a particular week. Participants were compensated $1 per weekly survey with $5 bonuses for completion of five consecutive on-time surveys. The baseline interview response rate was 84%, and 99% agreed to participate in the longitudinal study; 79% completed 12 months or more of weekly surveys.

For this analysis, we included women who were not pregnant at baseline and who completed more than one weekly survey. We focused on the first 12 months of data given the high response rates during this time and because our mental health symptoms measures were included only at baseline. Our final sample included 952 women, contributing 27,130 journals over the first study year.

Primary Predictor and Outcome Measures

Baseline Mental Health Symptoms

We have previously described our measurement of mental health symptoms [9,16,17]. Standard abbreviated stress and depression instruments were included in the baseline survey interview [46,47]. The Perceived Stress Scale (PSS-4) is an abbreviated scale that assesses the degree to which one appraises his or her life situations as stressful, unpredictable, uncontrollable, and overloading over the previous month [46]. Women were asked how often (0=never, 1=almost never, 2=sometimes, 3=fairly often, 4=very often) they felt the following four symptoms of stress: “unable to control important things in life;” confident about ability to handle personal problems;” “things were going your way;” and “difficulties were piling up so high that you could not overcome them.” Positively worded items were reverse coded. Items were summed for a total score, which could range from 0–16 with higher scores indicating greater stress symptoms. We used a standard score cut-off of ≥9 points on the PSS-4 to denote moderate/severe stress symptoms [9,16,17,46].

The Center for Epidemiologic Studies – Depression Scale-5 (CES-D-5) is an abbreviated depression scale that assesses depressive symptoms over the previous week [47]. Women were asked how often they felt the following five symptoms over the past 7 days: “like you could not shake off the blues;” “depressed;” “sad;” “life was not worth living;” and “happy.” Responses were scored on a 4-point scale (0=rarely or none of the time, 1=some or little of the time, 2=occasionally or moderate amount of time, 3=most or all of the time); the positively worded item was reverse coded. Items were then summed for a total depression score. Scores range from 0–15; a higher score indicates a higher degree of symptoms. We used standard score cut-off of ≥4 points on the CES-D-5 to denote moderate/severe depression symptoms [9,16,17,47].

Sexual Intercourse

In each weekly survey, women were asked whether they had sexual intercourse with any partner in the previous week, which was defined to participants as “when a man puts his penis into a woman's vagina.” A week was coded 1 for sexual intercourse if a woman responded “yes” and 0 if she responded otherwise.

Sociodemographic and Reproductive Background Characteristics

Covariate selection was based upon our previous work [9,16,17]. At baseline and weekly, we assessed women's sociodemographic and reproductive characteristics, including: age; race/ethnicity (non-Hispanic White, non-Hispanic Black, Hispanic, or other; and Black or non-Black); educational enrollment (not enrolled in school, still in high school, enrolled in 2 year program, enrolled in 4 year college, or dropped out of high school); employment status (employed or unemployed); public assistance recipient (yes or no); childhood household/family structure (lived with 2 biological/step parents, 1 parent only, or other); mother's age at first birth (less than 20 years old or ≥20 years old); frequency of religious service attendance (never, <weekly, or ≥weekly); relationship status (married, engaged, in a committed relationship, in a casual/sexual relationship, or none); cohabiting (with marital or non-marital partner, yes or no); age at coitarche; lifetime number of sexual partners; ever had sex without using birth control; and history of pregnancy. Coefficients for baseline and time-variant versions of these covariates did not differ significantly in models for the first year of data, so we present results using baseline covariates.

Statistical Analysis

We present percentage distributions of the categorical measures of women's background characteristics, mental health symptoms and weeks of sexual intercourse. We conducted unadjusted bivariate X2 tests to compare the proportion of weeks of sexual intercourse by category, for background characteristics and mental health symptoms. We used multi-level, mixed effects, multivariable logistic regression models to further examine associations between background characteristics, mental health symptoms, and weekly sexual intercourse. All models controlled for covariate fixed effects, random effects for the woman, and the number of journals completed. We estimated relationships between moderate/severe stress symptoms and moderate/severe depression symptoms and the weekly odds of sexual intercourse in separate models. We estimated full regression models first, followed by reduced models controlling only for significant covariates.

Covariates were considered for inclusion in regression models if their p-values in the bivariate models were <0.25. For collinear variables (e.g. reproductive history indicators), we retained only variables with the strongest effect in the final models. Results are presented as exponentiated coefficients from regression models (adjusted odds ratios (aOR) and 95% confidence intervals (CI)). Two-tailed alphas of P<0.05*, P<0.01**, and P<0.001*** were considered significant. Data were analyzed using Stata 12.0 (StataCorp LP, College Station, TX).

Results

Characteristics of the sample

Sociodemographic, reproductive and mental health background characteristics of the sample (n=952) are presented in Table 1. Women identified as White (59%) and Black (31%) race/ethnicity. Over half of women were enrolled in a 2- or 4-year college (57%). A quarter of women were receiving public assistance (27%); half were unemployed (50%). Nearly three quarters of women were in some type of relationship (73%) and 17% were cohabiting with a partner. The majority of women were sexually experienced at baseline (77%), with 51% reporting coitarche at age 16 years or younger. Nearly half of women reported a history of sex without using birth control (48%) and nearly one fifth had a history of pregnancy (22%). Finally, 23% of women reported moderate/high stress symptoms and 24% reported moderate/severe depression symptoms at baseline.

Table 1.

Proportions of sexual intercourse weeks over the 12-month study period, among all women and by sociodemographic characteristics and mental health symptoms

(N=952 women, 27,130 weeks) Total % % of weeks in which sexual intercourse occurred p-value

All women 100 36

Sociodemographic and Reproductive Background Characteristics at Baseline

Age 0.60
 18 years 41 36
 19 years 50 37
 20 years 9 36

Race/ethnicity <0.001
 White 59 38
 Black 31 31
 Hispanic 8 40
 Other 2 43

Educational enrollment <0.001
 Not enrolled 22 48
 High school 14 33
 2 year college 29 36
 4 year college 28 30
 High school drop-out 8 48

Employment status <0.001
 Employed 50 41
 Unemployed 50 32

Receiving public assistance <0.001
 Yes 27 43
 No 73 35

Childhood family structure <0.001
 2 parents (biological/step) 52 34
 1 parent only 40 38
 Other 8 42

Mother's age at first birth <0.001
 <20 years old 37 42
 ≥20 years old 63 34

Religious service attendance <0.001
 Never 22 42
 < weekly 52 42
 ≥ weekly 26 22

Relationship status <0.001
 Married 2 74
 Engaged 7 69
 Committed relationship 48 50
 Casual/sexual relationship 16 29
 None 27 12

Cohabiting status <0.001
 Cohabiting 17 69
 Not cohabiting 83 31

Lifetime number of sexual partners <0.001
 0 23 5
 1 17 46
 2 13 45
 ≥3 46 53

Age at coitarche <0.001
 ≥ 16 years 51 52
 > 16 years 49 24

Ever had sex without using birth control <0.001
 Yes 48 53
 No 52 25

History of pregnancy <0.001
 Yes 22 51
 No 78 34

Mental Health Symptoms

Moderate/severe stressa <0.001
 Yes (≥9pts PSS-4) 23 43
 No (<9pts PSS-4) 77 35

Moderate/severe depressionb <0.001
 Yes (≥4pts CESD) 24 40
 No (<4pts CESD) 76 35

N= 952 women (27,130 weekly journals). Results presented as proportions (%) of weeks of sexual intercourse. P-values are from unadjusted Chi-square comparing proportions across sociodemographic and reproductive characteristics and mental health symptoms. P-values significant for two-tailed alpha at <0.05*, <0.01**, and <0.001***;^p-value marginal at p<0.10. Stress, depression, and covariates were measured at baseline. Sexual intercourse measured each week.

a

Perceived Stress Scale - 4 (PSS-4) - 9-point cut-off for moderate/severe stress symptoms.

b

Center for Epidemiologic Studies – Depression Scale (CES-D-5) – 4 point cut-off for moderate/severe depression symptoms. Results for associations between stress and depression and sexual intercourse also similar when modeled as a 4-level categorical combined mental health symptom variable (no symptoms, moderate/severe stress symptoms only, moderate/severe depression symptoms only, or comorbid stress and depression symptoms).

Associations between sexual intercourse, background and mental health characteristics

Women reported sexual intercourse in 36% of weeks. In the unadjusted bivariate analysis, the proportion of weeks in which sexual intercourse occurred varied significantly by all sociodemographic and reproductive background characteristics, with the exception of age (Table 1, all p-values<0.001). Compared to their counterparts, more frequent sexual intercourse was noted among women who were non-Black, not enrolled/dropped out of school, employed, receiving public assistance, from a nontraditional childhood family structure (1 parent only or other), born to a teen mother, infrequently or never attending religious services, married, engaged or cohabiting, as well as women with more lifetime sexual partners, early age at coitarche, history of sex without using birth control, and history of pregnancy(ies).

The frequency of sexual intercourse was also higher among women with moderate/severe stress (43%) and depression (40%) symptoms compared to women without moderate/severe symptoms (35% and 35%, respectively, p-values<0.001) (Table 1).

In multivariable models controlling for random woman effects and covariate fixed effects (Tables 2 and 3), women with moderate/severe stress symptoms had 1.6 times higher weekly odds of sexual intercourse compared to those without stress symptoms (aOR 1.6, 95% CI 1.1, 2.5, p=0.04). Depression symptoms did not predict sexual intercourse in adjusted models.

Table 2.

Effect of stress symptoms on the weekly odds of sexual intercourse

Model 1 Univariate Model 3 Full Model 4 Reduced

aOR CI aOR CI aOR CI

Stress symptomsa
 <Moderate/severe (<9pts PSS) 1 1 1
 Moderate/severe (≥9pts PSS) 1.8* 1.1,2.9 1.5* 1.0,2.4 1.6* 1.1,2.5
Race/ethnicity
 Non-Black 1 1
 Black 0.7^ 0.4,1.1 0.7^ 0.5,1.1
Educational enrollment
 Not enrolled/drop-out 1 1
 High school 0.8 0.4,1.5 0.7 0.4,1.3
 2 year college 0.9 0.6,1.5 0.8 0.5,1.4
 4 year college 0.6^ 0.4,1.0 0.5* 0.3,0.9
Employment status
 Unemployed 1
 Employed 1.3 0.9,1.8
Receiving public assistance
 No 1
 Yes 0.6^ 0.4,1.0
Childhood family structure
 2 parents (biological/step) 1
 1 parent only 0.8 0.5,1.1
 Other 0.6 0.3,1.2
Religious service attendance
 < weekly 1 1
 ≥ weekly 0.5** 0.3,0.8 0.4*** 0.3,0.7
Cohabitation status
 Not cohabiting 1 1
 Cohabiting 8.7*** 5.2,14.5 8.6*** 5.2,14.2
Age at coitarche
 > 16 years 1 1
 ≤ 16 years 6.0*** 4.0,9.0 6.7*** 4.5,10.0
History of pregnancy
 No 1
 Yes 1.1 0.7,1.8

N= 952 women (27,130 weekly journals). Results are adjusted odds ratios (aOR) and 95% confidence intervals (CI) from univariate, full and reduced multi-level, mixed-effects logistic regression models estimating effect of moderate/severe stress symptoms on the odds of sexual intercourse each week, controlling for a random effect for the woman and number of number of journals completed. P-values significant for two-tailed alpha at <0.05*, <0.01**, and <0.001***; ^p-value marginal at p<0.10. Stress and background covariates were measured at baseline

a

Perceived Stress Scale - 4 (PSS-4) - 9-point cut-off for moderate/severe stress symptoms. When modeled as a 4-level categorical combined mental health symptom variable (no symptoms, moderate/severe stress symptoms only, moderate/severe depression symptoms only, comorbid stress and depression symptoms) (not shown), point estimates for stress and comorbid stress/depression similar to those shown for stress.

Table 3.

Effect of depression symptoms on the weekly odds of sexual intercourse

Model 1 Univariate Model 3 Full Model 4 Reduced

aOR CI aOR CI aOR CI

Depression symptomsa
 <Moderate/severe (<4pts CESD) 1 1 1
 Moderate/severe (≥4pts CESD) 1.4 0.9,2.2 1.0 0.7,1.6 1.0 0.7,1.5
Race/ethnicity
 Non-Black 1 1
 Black 0.7^ 0.4,1.1 0.6* 0.4,0.9
Educational enrollment
 Not enrolled/drop-out 1 1
 High school 0.8 0.4,1.4 0.8 0.4,1.4
 2 year college 0.9 0.6,1.5 0.9 0.6,1.5
 4 year college 0.6^ 0.4,1.0 0.6^ 0.4,1.1
Employment status
 Unemployed 1
 Employed 1.2 0.8,1.8
Receiving public assistance
 No 1 1
 Yes 0.6* 0.4,1.0 0.6* 0.4,0.9
Childhood family structure
 2 parents (biological/step) 1
 1 parent only 0.8 0.5,1.2
 Other 0.7 0.3,1.3
Religious service attendance
 < weekly 1 1
 ≥ weekly 0.5** 0.3,0.8 0.5** 0.3,0.8
Cohabitation status
 Not cohabitating 1 1
 Cohabitating 8.3*** 5.0,13.9 8.4*** 5.0,14.0
Age at coitarche
 > 16 years 1 1
 ≤ 16 years 6.3*** 4.2,9.5 6.4*** 4.3,9.5
History of pregnancy
 No 1
 Yes 1.1 0.7,1.8

N= 952 women (27,130 weekly journals). Results are adjusted odds ratios (aOR) and 95% confidence intervals (CI) from univariate, full and reduced multi-level, mixed-effects logistic regression models estimating effect of moderate/severe depression symptoms on the odds of sexual intercourse each week, controlling for a random effect for the woman and number of number of journals completed. P-values (P) significant for two-tailed alpha at <0.05*, <0.01**, and <0.001***; ^p-value marginal at p<0.10. Depression and background covariates were measured at baseline.

a

Center for Epidemiologic Studies – Depression Scale (CES-D-5) – 4 point cut-off for moderate/severe depression symptoms.

Other predictors of sexual intercourse included race/ethnicity, educational enrollment, receipt of public assistance, religious service attendance, cohabitation, and age at coitarche (Tables 2 and 3).

Discussion

Positive associations between sexual intercourse and different psychological and physiological health indicators, including biological markers of stress response, have been documented [2228]. In a comprehensive review of the literature on the health benefits of sex, Brody et al found that frequent and regular sexual intercourse was correlated with greater mental health wellbeing, less depressive symptoms, better heart rate variability, and lower blood pressure, among other outcomes [24]. Most studies, including those in the literature review, though, have focused on sexual behaviors of middle- and older-aged adults. Our findings contribute to this literature by pointing to the link between adolescents' mental health and sexual activity. The 1.6 times higher odds of sexual intercourse experienced by young women in our study with moderate/severe stress symptoms at baseline (compared to those without symptoms) appears to be non-trivial given that the estimate represents an effect of stress on sex for each week over the one year study period. Unfortunately, the larger study from which data were drawn did not include time-variant measures of mental health symptoms following sexual activity or even at the conclusion of the study period, which precluded our ability to determine whether increased frequency of sexual intercourse corresponded with improved mental health symptoms over time. Or, vice versa – whether changes in mental health status led to changes in sexual intercourse activity. Additional research is needed to test whether more frequent sexual intercourse among adolescents with stress symptoms may be a health promotion behavior used to reduce stress and improve psychological wellbeing.

The majority of research on adolescents' mental health and sexual behaviors has largely focused on a few outcomes (e.g. early coitarche, multiple sexual partners), used specific study samples/settings (e.g. sexual minorities, homeless youth, HIV/AIDS-contexts) or been limited by cross-sectional and retrospective designs [4145, 4850]. A dearth of research is available to support our findings and provide further understanding of interrelationships between mental health and frequency of sexual intercourse, especially among healthy adolescents in population-based contexts. In Sales et al's recent HIV intervention study of 304 African American adolescent women, depressive symptoms were positively associated with higher sexual arousability, which was related to the frequency of vaginal sex in the past six months, among their clinic-based sample [51]. Unlike the Sales study, we did not find a relationship between depression symptoms and sexual frequency, nor did the larger study from which our data were drawn include other important measures of sexual health, such as masturbation, sexual satisfaction, pleasure, arousability, etc. All of these indicators would be critical to consider in future studies of mental and sexual health given that they may mediate or help explain relationships between stress and frequency of intercourse. Nonetheless, ours is the first study of which we are aware to extend the question beyond depression and findings begin to highlight the role of stress in sexual experiences for young women.

Health behavior research in other areas has suggested that young women often engage in risky behaviors to cope with or alleviate stress and mental distress, including substance use, binge eating and even sex while intoxicated [32,33,4145]. Frequent sexual intercourse (i.e. increased exposure) among adolescent women with stress symptoms (which we have described here) may contribute to increased risk of unintended pregnancy and sexually transmitted infections if condoms and other contraceptive methods are not or mis-used (which we have described elsewhere [9,16,17]). Research is warranted to evaluate the other health-related behaviors – both sexual and non-sexual – that young women may use to cope with stress and depression symptoms, and other mental health issues, and their contributions to sexual and reproductive outcomes.

Additionally, the reciprocal relationship – whereby a broader range of sexual behaviors and health, including intercourse, masturbation, sexual satisfaction, etc, influences mental and physical health, especially during adolescence and young adulthood – also deserves attention. Perhaps this would be particularly relevant for research on mental health and contraceptive use. For instance, the Sales et al study found a positive association between higher depressive symptoms, sexuality constructs including arousability, and the number of unprotected vaginal intercourse encounters [51]. Similarly, findings from our own previous work on mental health and contraceptive behaviors using these same data suggested that our women with baseline stress and depression symptoms experienced an increased risk of contraceptive nonuse and inconsistent use over one year (including both condoms and hormonal contraceptive methods) [1621]. In both our current and previous analyses, mental health measurement was limited to baseline abbreviated assessments of stress and depression, which prevented an adequate examination of dynamic relationships between mental health and sexual activity and the potential effects of sexual intercourse frequency on stress and depression symptoms over time. Collectively, findings from this small body of research point to the need for additional longitudinal studies, which can illuminate corresponding trajectories of mental and sexual and reproductive health outcomes across adolescence and young adulthood.

Several other important limitations of our study are noteworthy. Our standard abbreviated screening instruments used to measure stress and depression assessed mental health symptoms at only baseline and were not comprehensive or diagnostic. Other important psychological and biological health measures, such as biomarkers of stress or sexually transmitted infection outcomes, were not assessed. Nor were other behavioral and psychosocial indicators of “coping,” such as substance use, eating disordered symptoms, diet, exercise and sleep patterns, or social support, which have been linked with sexual behavior [6,29,32]. Moreover, relationship dynamics were not the focus here, but potentially played an important role in associations between stress and sexual intercourse. Intimate partner violence, for instance, is highly correlated with adverse sexual experiences and with negative mental and physical health outcomes, while stable relationships with supportive partners may have a positive effect on both mental and sexual health [29,30,32,52,53]. All of these factors would be relevant for future investigations of the interrelationships between mental and sexual and reproductive health among young women.

Despite limitations, our study contributes new information on understudied, intersecting dimensions of women's health and wellbeing during adolescence. Specifically, commonly experienced stress symptoms appear to influence young women's sexual behaviors and reproductive outcomes. Our findings have implications for sexual and reproductive health providers, especially those who care for women with mental health considerations. Young women who wish to avoid unintended pregnancy and sexually transmitted infections should be educated and counseled on the risks of increased sexual activity when unprotected, which can contribute to both adverse reproductive health outcomes and mental distress [6]. Young women who present clinically with elevated mental health symptoms, such as those with positive screens on standard stress or depression instruments, may benefit from tailored clinical approaches that help them to understand the importance of their mental health status for contraceptive decision-making and behavior, and then equip them with the knowledge and self-efficacy to choose and successfully use effective contraceptive methods, including dual method use. Finally, while additional research is needed to understand whether and how young women's sexual activity shapes their mental and physical health outcomes, clinical and public health strategies can continue to promote (safe and consensual) sex as an important and normal part of health and wellbeing for all women, including adolescents [54,55].

Acknowledgement

This work was supported by an NICHD Building Interdisciplinary Research Careers in Women's Health “BIRCWH” K-12 Career Development Award #K12HD001438 (Hall, PI Johnson), by NICHD grant #R01-HDHD050329 (Barber), by NICHD grant #R24HD041028 (Smock) and by NICHD grant # R21-DA024186 (Axinn).

Footnotes

Conflict of Interest We have no relevant conflicts or disclosures to report.

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