Sexual Orientation-Specific Policies Are Associated With Prenatal Care Use in the First Trimester Among Sexual Minority Women: Results From a Prospective Cohort Study.

BACKGROUND: Previous research has shown sexual minority women (SMW) are more likely to report multiple maternal and infant health outcomes compared to heterosexual women and that these outcomes are moderated by the policy environment. Little is known, however, about prenatal care use disparities or the social determinants of prenatal care use for SMW. PURPOSE: To examine the relationship between sexual orientation-specific policies that confer legal protections (e.g., hate crime protections, housing discrimination, same-sex marriage) and prenatal care use among women using a prospective, population-based data set. METHODS: Using the National Longitudinal Study of Adolescent to Adult Health and logistic regression, we link measures of state policies to the use of prenatal care in the first trimester among women who had live births. The use of prospective data allows us to adjust for covariates associated with preconception care use prior to pregnancy (n = 586 singleton births to SMW; n = 4,539 singleton births to heterosexual women). RESULTS: Sexual orientation-specific policies that conferred protections were associated with increased use of prenatal care among pregnancies reported by SMW (OR = 1.86, 95% CI 1.16, 2.96). In fact, in states with zero protections, we found no differences in prenatal care use by sexual minority status; however, in states with two or more protective policies, SMW were more likely to access prenatal care in the first trimester than heterosexual women. There was no relationship between sexual orientation-specific policy environments and prenatal care use among pregnancies reported by heterosexual women. CONCLUSIONS: Recent research has documented that SMW are more likely to have adverse perinatal and obstetrical outcomes than their heterosexual peers. These findings suggest that Lesbian/Gay/Bisexual-specific policy protections may facilitate the use of prenatal care among SMW, a potentially important pathway to improve reproductive health among this population.

Previous studies have found that sexual minority women (SMW) are more likely to report adverse infant outcomes, particularly for women who do not live in states with anti-discrimination policies against lesiban, gay, bisexual, transgnder, or queer (LGBTQ) populations. This is the first to examine sexual orientation disparities in prenatal care use using a nationally representative, prospective data set. Additionally, we examined whether prenatal care use varied by the number of state-level policies that protect against discrimination based on sexual orientation. Our results show high rates of prenatal care use in the first trimester across all sexual orientations, however, in states with states with two or more policies that prevent discrimination by sexual orientation, sexual minority women were more likely to access prenatal care in the first trimester than heterosexual women. These findings suggest that more inclusive state-level environments promote healthcare-seeking behaviors during pregnancy for sexual minority women.

Sexual orientation disparities in gestational diabetes and hypertensive disorders of pregnancy.

BACKGROUND: Sexual minority (SM) individuals (e.g., those with same-sex attractions/partners or who identify as lesbian/gay/bisexual) experience a host of physical and mental health disparities. However, little is known about sexual orientation-related disparities in gestational diabetes mellitus (GDM) and hypertensive disorders of pregnancy (HDP; gestational hypertension [gHTN] and preeclampsia). OBJECTIVE: To estimate disparities in GDM, gHTN and preeclampsia by sexual orientation. METHODS: We used data from the Nurses' Health Study II-a cohort of nurses across the US enrolled in 1989 at 25-42 years of age-restricted to those with pregnancies ≥20 weeks gestation and non-missing sexual orientation data (63,518 participants; 146,079 pregnancies). Our primary outcomes were GDM, gHTN and preeclampsia, which participants reported for each of their pregnancies. Participants also reported their sexual orientation identity and same-sex attractions/partners. We compared the risk of each outcome in pregnancies among heterosexual participants with no same-sex experience (reference) to those among SM participants overall and within subgroups: (1) heterosexual with same-sex experience, (2) mostly heterosexual, (3) bisexual and (4) lesbian/gay participants. We used modified Poisson models to estimate risk ratios (RR) and 95% confidence intervals (CI), fit via weighted generalised estimating equations, to account for multiple pregnancies per person over time and informative cluster sizes. RESULTS: The overall prevalence of each outcome was ≤5%. Mostly heterosexual participants had a 31% higher risk of gHTN (RR 1.31, 95% CI 1.03, 1.66), and heterosexual participants with same-sex experience had a 31% higher risk of GDM (RR 1.31, 95% CI 1.13, 1.50), compared to heterosexual participants with no same-sex experience. The magnitudes of the risk ratios were high among bisexual participants for gHTN and preeclampsia and among lesbian/gay participants for gHTN. CONCLUSIONS: Some SM groups may be disparately burdened by GDM and HDP. Elucidating modifiable mechanisms (e.g., structural barriers, discrimination) for reducing adverse pregnancy outcomes among SM populations is critical.

Gender(ed) science: How the institutionalization of gender continues to shape the conduct and content of women's health research.

Gender refers to the socially constructed roles, behaviors, and attributes that a particular society considers appropriate for men and women based on assumptions about biological sex. It also operates as a major social organizing principle that confers unequal power, status, and resources to men and women, with direct consequences for health. Historic patriarchal and misogynistic beliefs and values are reinforced through social institutions, including health science, which reify gender inequities. This commentary examines two key domains in which the social organization and institutionalization of gender in scientific research affect the conduct of women's health research and, by extension, women's health outcomes. These domains are: 1) decisions about which topics are prioritized, researched, and funded and 2) the dissemination of research findings. Using the National Institutes of Health (NIH) as a case study to illustrate broader patterns in scientific research, we present evidence of gender-based inequities in what is prioritized, deemed fundable, and disseminated, and how this affects knowledge production and attention to women's health. We highlight efforts and progress made by the NIH and call for additional attention to further address gender-based inequities and their impact on women's health research. We conclude with a call for critical social science analyses-ideally supported by the NIH-of the social organization of health science research to identify points of intervention for redressing deep-seated obstacles to advancing research on women's health.

Structural heteropatriarchy and maternal cardiovascular morbidities.

The United States has some of the poorest maternal health outcomes of any developed nation. Existing research on maternal cardiovascular morbidities has focused predominantly on individual- and clinic-level drivers, but we know little about community- and structural-level factors that shape these outcomes. We use a composite measure of "structural heteropatriarchy" which includes measures of structural sexism and structural LGB-stigma to examine the relationship between structural heteropatriarchy and three cardiovascular-related maternal morbidities using the National Longitudinal Study of Adolescent to Adult Health (n = 3928). Results using multivariate regressions show that structural heteropatriarchy is associated with increased risk of reporting maternal morbidities. Our findings provide further evidence that sexuality- and gender-based stigma operate together to shape health disparities, including maternal health.

Disparities in Mortality by Sexual Orientation in a Large, Prospective Cohort of Female Nurses.

Importance: Extensive evidence documents health disparities for lesbian, gay, and bisexual (LGB) women, including worse physical, mental, and behavioral health than heterosexual women. These factors have been linked to premature mortality, yet few studies have investigated premature mortality disparities among LGB women and whether they differ by lesbian or bisexual identity. Objective: To examine differences in mortality by sexual orientation. Design, Setting, and Participants: This prospective cohort study examined differences in time to mortality across sexual orientation, adjusting for birth cohort. Participants were female nurses born between 1945 and 1964, initially recruited in the US in 1989 for the Nurses' Health Study II, and followed up through April 2022. Exposures: Sexual orientation (lesbian, bisexual, or heterosexual) assessed in 1995. Main Outcome and Measure: Time to all-cause mortality from assessment of exposure analyzed using accelerated failure time models. Results: Among 116 149 eligible participants, 90 833 (78%) had valid sexual orientation data. Of these 90 833 participants, 89 821 (98.9%) identified as heterosexual, 694 (0.8%) identified as lesbian, and 318 (0.4%) identified as bisexual. Of the 4227 deaths reported, the majority were among heterosexual participants (n = 4146; cumulative mortality of 4.6%), followed by lesbian participants (n = 49; cumulative mortality of 7.0%) and bisexual participants (n = 32; cumulative mortality of 10.1%). Compared with heterosexual participants, LGB participants had earlier mortality (adjusted acceleration factor, 0.74 [95% CI, 0.64-0.84]). These differences were greatest among bisexual participants (adjusted acceleration factor, 0.63 [95% CI, 0.51-0.78]) followed by lesbian participants (adjusted acceleration factor, 0.80 [95% CI, 0.68-0.95]). Conclusions and Relevance: In an otherwise largely homogeneous sample of female nurses, participants identifying as lesbian or bisexual had markedly earlier mortality during the study period compared with heterosexual women. These differences in mortality timing highlight the urgency of addressing modifiable risks and upstream social forces that propagate and perpetuate disparities.

Associations of adult roles and minority stressors with trajectories of alcohol dependence symptoms throughout adulthood among sexual minority women.

OBJECTIVE: In the present study, we sought to identify trajectories of symptoms of potential alcohol dependence (AD) among adult sexual minority women (SMW). Theoretical correlates were examined in relation to the empirically identified trajectories. METHOD: Data were collected at three time points between 2000 and 2012 from SMW drinkers (n = 434) enrolled in a longitudinal study (M Age = 37.49 at baseline, SD = 11.55). Using an accelerated-cohort longitudinal design, latent growth curve mixture models identified homogeneous patterns of any past-year symptoms of potential AD. Correlates of trajectories included alcohol-related developmental risk factors, adult roles, and exposure to minority stressors. RESULTS: Three trajectories were identified that captured risk of symptoms of potential AD over time, reflecting: (a) relatively consistent, low risk over time; (b) deceleration in risk throughout adulthood; (c) relatively persistent, high risk over time. Consistent with prior work, SMW drinkers who reported higher levels of perceived stigma or masculinity showed persistently high risk of reporting at least one past-year symptom of potential AD. CONCLUSIONS: Most SMW drinkers report deceleration in risk of AD symptoms over time. Findings have implications for prevention and intervention efforts tailored to SMW drinkers. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Sexual Orientation-Related Nondiscrimination Laws and Maternal Hypertension Among Black and White U.S. Women.

Background: Black women and sexual minority women are more likely to report adverse maternal health. Little research has investigated maternal health disparities at the intersection of race/ethnicity and sexual orientation or the mechanisms that contribute to these disparities. Materials and Methods: We analyzed data from the National Longitudinal Study of Adolescent to Adult Health. Our sample was restricted to Black and White women who had at least one live birth and were followed-up in Wave V of the data (n = 3,396). We used multivariable logistic regression to analyze the associations between race, sexual orientation identity, and a four-item state-level index of sexual orientation-related nondiscrimination laws. Results: We found that higher numbers of state-level sexual orientation-related nondiscrimination laws were associated with lower risk of maternal hypertension among U.S. women overall (odds ratio [OR] = 0.82, 95% confidence interval [CI] 0.73-0.93), and Black women had a higher risk of maternal hypertension relative to White women (OR = 1.32, 95% CI 1.00-1.79). Interactions between race, sexual orientation identity, and sexual orientation-related policies show that, regardless of sexual orientation identity, sexual orientation-related nondiscrimination laws were associated with a lower risk of maternal hypertension among White mothers (OR = 0.80, 95% CI 0.70-0.92). However, among Black women, these laws were associated with a lower risk of maternal hypertension among lesbian and bisexual women (OR = 0.18, 95% CI 0.05-0.68) only. Conclusions: Laws that prevent discrimination related to sexual orientation in various societal domains may play an important role in improving maternal health outcomes among White women in general and Black lesbian and bisexual women in particular.

Adverse pregnancy and birth outcomes in sexual minority women from the National Survey of Family Growth.

BACKGROUND: Few studies have examined how multiple marginalized identities are associated with adverse pregnancy and birth outcomes, especially for Black and Hispanic sexual minority women. Sexual minorities are people who identify as lesbian, gay, bisexual or transgender (LGBT). The purpose of this study was to examine differences in adverse pregnancy (i.e., miscarriage) and birth outcomes (i.e., preterm birth, low birthweight, and stillbirth) in a national sample of women by race and ethnicity, and sexual minority status (LGBT identification and same-sex sexual behavior). METHODS: We conducted a cross-sectional analysis of the National Survey of Family Growth (NSFG). The unit of analysis was pregnancy, not participants. In this study, we examined pregnancies to participants who identified as heterosexual, lesbian, and bisexual, by race and Hispanic ethnicity. We also studied sexual behaviors to categorize participants as women who have sex with women (WSW) and women who have sex with men (WSM). Outcomes included preterm birth, low birthweight, miscarriage, and stillbirth. We employed logistic and linear regression analyses for analyses using STATA. RESULTS: We studied 53,751 pregnancies, and 9% of these occurred in people who identified as heterosexual, but had engaged in sexual activity with a female partner (heterosexual-WSW), 7% in those identifying as bisexual, and 1% to women who identified as lesbian. Pregnancies ended in preterm birth (10.7%) and low birthweight (9.0%), stillbirths (2-4%), and miscarriages (17-21%) in sexual minority women. We observed that pregnancies reported by Hispanic lesbian women had a higher birthweight (ß = 10.71, SE = 4.1, p-value = 0.01) compared to infants born to Hispanic heterosexual-WSM. Pregnancies to lesbian women were significantly more likely to end in stillbirth (aRR = 3.58, 95% CI 1.30,9.79) compared to heterosexual-WSM. No significant differences were noted in risk of adverse birth outcomes by sexual orientation for NH Black or Hispanic women. CONCLUSION: In this sample, preterm births were less likely to occur among heterosexual-WSW than in heterosexual-WSM. Pregnancies to lesbians and bisexual women were more likely to end in miscarriage or stillbirth than heterosexual WSM. Lesbian Hispanic women reported higher birthweights compared to heterosexual-WSM Hispanic women. More research should be done to further understand these findings.

Mothers' Sexual Identity and Children's Health.

Sexual minority women face a plethora of structural, socioeconomic, and interpersonal disadvantages and stressors. Research has established negative associations between women's sexual minority identities and both their own health and their infants' birth outcomes. Yet a separate body of scholarship has documented similarities in the development and well-being of children living with same-sex couples relative to those living with similarly situated different-sex couples. This study sought to reconcile these literatures by examining the association between maternal sexual identity and child health at ages 5-18 using a US sample from the full population of children of sexual minority women, including those who identify as mostly heterosexual, bisexual, or lesbian, regardless of partner sex or gender. Analyses using data from the National Longitudinal Study of Adolescent to Adult Health (N=8,978) followed women longitudinally and examined several measures of their children's health, including general health and specific developmental and physical health conditions. Analyses found that children of mostly heterosexual and bisexual women experienced health disadvantages relative to children of heterosexual women, whereas the few children of lesbian women in our sample evidenced a mixture of advantages and disadvantages. These findings underscore that to understand sexual orientation disparities and the intergenerational transmission of health, it is important to incorporate broad measurement of sexual orientation that can capture variation in family forms and in sexual minority identities.

Examining Differences in Alcohol and Smoking Behaviors between Parenting and Nonparenting Lesbian Women.

BACKGROUND: The transition to parenthood is a significant life event that has implications for health behaviors and health. Few studies have examined alcohol use and smoking by parenthood status (nonparent vs. parent) among women who identify as lesbian. METHODS: This study used data from two longitudinal studies, the Chicago Health and Life Experiences of Women Study (n = 135) and the U.S. National Longitudinal Lesbian Family Study (n = 116), to compare problem drinking and cigarette smoking trajectories among lesbian-identified women by parenthood status. We used mixed models to investigate differences in problem drinking and cigarette smoking in three waves of data in each study. RESULTS: Lesbian parents reported significantly less problem drinking, but not cigarette smoking, than nonparent lesbian women. When considering the interaction between parental status and time, problem drinking was significantly higher among nonparents than parents at each time interval. CONCLUSIONS: Parenthood was associated with positive changes in drinking among lesbian women; however, more research is needed to understand how to support smoking cessation among parenting lesbian women.

Gender self-concept and hazardous drinking among sexual minority women: Results from the Chicago health and life experiences of women (CHLEW) study.

OBJECTIVE: Sexual minority women (SMW; e.g., lesbian, bisexual) report substantially higher rates of hazardous drinking (HD) than heterosexual women.Yet, few studies have examined sub-group differences. In this study, we investigated the relationship between gender self-concept and HD among SMW. Research consistently shows a link between heavier drinking and masculinity. SMW are more likely than heterosexual women to be gender nonconforming, and masculinity among SMW is associated with increased minority stress, a key HD risk factor. METHODS: We used Wave 3 data from the Chicago Health and Life Experiences of Women study, a longitudinal study of SMW (N = 598), which assessed participants' self-perceived levels of masculinity and femininity and their perception of how masculine/feminine others viewed them. Using multivariable logistic regression, we examined the association between gender self-concept and past 12-month heavy episodic drinking (HED), drinking-related problems, and alcohol dependence. RESULTS: Controlling for demographics and minority stress, greater masculinity (both self-perceived and perceptions by others) was associated with higher odds of HED and alcohol dependence. Masculinity as perceived by others was associated with higher odds of drinking-related problems. Neither femininity measure was associated with HD. Additionally, minority stress (i.e., discrimination, stigma, internalized stigma) did not account for the relationship between gender self-concept and HD. CONCLUSIONS/IMPORTANCE: In this sample, masculinity, particularly SMW's beliefs that others viewed them as masculine, was associated with HD. This association was not attributable to differences in minority stress and may be related to differences in gendered drinking norms, which could be targeted in intervention studies.

State-Level Regulations Regarding the Protection of Sexual Minorities and Birth Outcomes: Results From a Population-Based Cohort Study.

OBJECTIVE: We leverage state-level variability in social policies that confer legal protections for sexual minorities (e.g., employment nondiscrimination acts) and examine their association with birth outcomes among sexual minority women. METHODS: We link measures of structural protections (i.e., social policies) to a prospective, population-based cohort of US adults-the National Longitudinal Study of Adolescent to Adult Health ( n = 7913 total singleton births, n = 274 singleton births to bisexual women, n = 53 singleton births to lesbian women)-which includes measurement of key risk factors for birth outcomes over the life course. RESULTS: Lesbian, gay, bisexual (LGB) policy protections were associated with better birth outcomes for lesbian women. For example, among lesbian women, the predicted birth weight for infants in states with no policy protections was 3.01 kg (95% confidence interval = 2.71-3.30) but was 3.71 kg (95% confidence interval = 3.46-3.96) in states with three or four policy protections. In negative control analyses, there was no association between LGB policy protections and birth outcomes among the nonstigmatized group (i.e., heterosexual women), providing evidence of specificity. Furthermore, in states with the most LGB policy protections, lesbian women were at lower risk for preterm births and had infants with higher birth weights than heterosexual and bisexual women. These associations remained robust after adjusting for 13 risk factors, including demographics, prior and current indicators of socioeconomic status, preconception and perinatal risk factors, and neighborhood characteristics. CONCLUSIONS: These results provide novel evidence that sexual orientation-related policy protections, measured at the state level, are associated with a decreased risk for adverse birth outcomes among lesbian women.

Sexual Orientation Disparities in Experiences of Male-Perpetrated Intimate Partner Violence: A Focus on the Preconception and Perinatal Period.

INTRODUCTION: Compared with their heterosexual counterparts, sexual minority women (SMW), especially those with male partners, are at increased risk for intimate partner violence (IPV). IPV has been linked to a variety of adverse maternal, infant, and child health outcomes. However, to date, no research has examined SMW's experiences of IPV in the context of pregnancy. This study explored whether SMW were more likely than exclusively heterosexual women with only male sexual partners (WSM) to report a variety of forms of IPV perpetrated by their male partner before or during pregnancy. METHODS: Data are from the National Longitudinal Study of Adolescent to Adult Health (Add Health). Our sample size ranged from 10,081 to 10,328 pregnancies, matched with their male pregnancy partner, reported by 3,828 to 3,873 women. RESULTS: Logistic regression results indicated that compared with heterosexual-WSM, mostly heterosexual women and heterosexual-women who have sex with women (WSW) were more likely to report any IPV, mostly heterosexual women were more likely to report an IPV-related injury, and heterosexual-WSW were more likely to report sexual assault. CONCLUSIONS: Results suggest that mostly heterosexual and heterosexual-WSW are at increased risk of experiencing multiple forms of IPV with their male pregnancy partners, highlighting the need for additional screening and prevention efforts to reduce IPV and its negative sequelae.

Sexual Fluidity and Psychological Distress: What Happens When Young Women's Sexual Identities Change?

The sexual identities of young women today are less binary and more fluid than ever before. Several theoretical perspectives imply that this fluidity could be accompanied by distress. To examine this, we analyzed four waves of data from Australian women born 1989 to 1995 (n = 11,527). We found no evidence of a universal association between sexual identity change and psychological distress. Instead, psychological distress was elevated when women changed their identity away from the heterosexual norm and lowered when they changed their identity toward it. Social stress partly attenuated these associations. In addition, women unsure of their identity at multiple assessment points reported significantly greater psychological distress in the final assessment than women who were never unsure. Our findings suggest that greater support should be offered to women who are questioning their sexual identity or developing a minority identity.

Measuring the Sexual Acceptability of Contraception: Psychometric Examination and Development of a Valid and Reliable Prospective Instrument.

BACKGROUND: People's sexual experiences have a strong association with contraceptive satisfaction and continuation, but no measures exist to specifically assess contraceptive-related sexual acceptability. AIM: This study developed and examined the psychometric properties of reliability, separation, and item fit of a new Contraceptive Sexual Acceptability (CSA) instrument. METHODS: Enrolled participants initiating a new contraceptive method from the HER Salt Lake longitudinal cohort study contributed baseline survey responses for scale development. The study included the Female Sexual Function Index, the New Sexual Satisfaction Scale, measures of physical and mood-related side effects, and self-reported perceptions of contraception's sexual impacts. Items from these measures' served as the basis for analyses. We analyzed responses using descriptive techniques and modeled using exploratory factor (EFA) and bifactor analyses (BFA). The Masters' Partial Credit Rasch method modeled reliability, separation, and item fit statistics. Here we evaluate (i) the reproducibility of relative measure location on the modeled linear latent variable, (ii) the number of statistically unique performance levels that can be distinguished by the measure, and (iii) the discrepancy between item responses and expectations of the model. Psychometric findings and theoretical models informed item reduction and final scale development. OUTCOMES: We developed a 10-item Contraceptive Sexual Acceptability scale that exceeded the thresholds and sufficiently covered domains for use in contraceptive research and clinical settings. RESULTS: Starting with data on 39-items from 4,387 individuals, we identified 10-items that best measured the CSA latent construct. The Rasch model included a total of 5 calibrations. We reduced items based on bifactor analysis and surpassed unidimensionality thresholds (OH = 0.84, ECV = 0.74) set a priori. The final items included questions with scaled responses about pleasure and orgasm (orgasm quality, orgasm frequency, giving partner pleasure), physical (arousal and function) and psychological (emotional connection, surrender) components, general questions of satisfaction and frequency, and a measure of perceived impact of contraception on sexual experiences in the previous 4 weeks. CLINICAL IMPLICATIONS: The 10-item CSA instrument covers physical and psychological aspects of contraceptive sexual acceptability and can be used in clinical settings. STRENGTHS & LIMITATIONS: The unidimensional CSA instrument offers a brief, yet comprehensive assessment of sexual acceptability. Given the limited diversity of the sample, implementation of this scale in contraceptive research and clinical interactions should be evaluated and validated in more diverse settings. CONCLUSION: Attuning to sexual acceptability could ultimately help contraceptive clients find methods that better meet their needs and preferences. Sanders JN, Kean J, Zhang C, et al. Measuring the Sexual Acceptability of Contraception: Psychometric Examination and Development of a Valid and Reliable Prospective Instrument. J Sex Med 2022;19:507-520.

Structural Heteropatriarchy and Birth Outcomes in the United States.

Emerging evidence links structural sexism and structural discrimination against lesbian, gay, and bisexual (LGB) populations to poor health outcomes, but studies have yet to examine the combined effects of these mutually reinforcing systems of inequality. Therefore, we developed a composite measure of structural heteropatriarchy-which includes state-level LGB policies, family planning policies, and indicators of structural sexism (e.g., women's political and economic position relative to men)-and examined its relationship to birth outcomes using data from Waves I to V of the National Longitudinal Study of Adolescent to Adult Health. Multivariate regression analyses demonstrated that higher levels of heteropatriarchy were associated with an increased risk of preterm birth and decreased birth weight, net of important covariates. There was no association between clinical low birth weight and heteropatriarchy, or interactions between heteropatriarchy and individuals' race, ethnicity or sexual identity, suggesting a negative effect of heteropatriarchy on birth outcomes for all pregnant people. This study demonstrates the importance of considering gender and sexuality as mutually reinforcing systems of oppression that impact population health. Future research should examine the impact of heteropatriarchy on additional health outcomes and in conjunction with other structural inequalities such as racism and transgender oppression.

Breastfeeding Initiation and Continuation Among Sexual Minority Women.

OBJECTIVES: Identify disparities in breastfeeding initiation and continuation among sexual minority women (SMW) and determine if known risk factors explain any observed disparities. METHODS: We used data from the 2006 to 2017 National Survey of Family Growth female pregnancy questionnaire. We measured sexual orientation using self-reported sexual identity and histories of same-sex sexual experiences reported by women (heterosexual-WSM [women who only reported sex with men]; heterosexual-WSW [women who reported sex with women]; bisexual, and lesbian. In total, we had 18,696 births that occurred within the last 10 years and used logistic and multinomial regression models to assess sexual orientation disparities in breastfeeding initiation and duration that clustered on women to account for potential multiple births to a woman. RESULTS: Compared to heterosexual-WSM, infants born to lesbian-identified women had decreased odds of ever being breastfed (OR 0.55, 95% CI 0.30, 0.99) and a decreased relative risk of being breastfed more than 6 months (RRR 0.46, 95% CI 0.22, 0.97). Infants of heterosexual-WSW had an increased odds of ever breastfeeding (OR 1.40, 95% CI 1.12, 1.74) and increased relative risk of breastfeeding more than 6 months (RRR 1.32, 95% CI 1.02, 1.69). CONCLUSIONS: Our results show that infants born to lesbian-identified women were less likely to be breastfed than those born to their heterosexual counterparts, even after adjusting for several factors associated with breastfeeding behaviors. We found no differences in breastfeeding between bisexual women and heterosexual-WSM. Understanding and addressing the barriers sexual minority women face for breastfeeding is critical for ensuring maternal and child health equity.

Disparities in smoking during pregnancy by sexual orientation and race-ethnicity.

The intersection between sexual orientation and race-ethnicity is emerging as an important dynamic for health. Prior research indicates that sexual orientation can have very different health implications for White, Black, and Latina individuals and that these patterns are unpredictable. Here we use U.S. data from the National Survey of Family Growth (2006-2019, n = 15,163 pregnancies) to examine how an important health indicator - smoking during pregnancy - is shaped jointly by sexual orientation and race-ethnicity. Smoking during pregnancy was more common among sexual minority women (both bisexual-identified and heterosexual-identified who expressed same-gender attraction/behavior), compared to heterosexual women. Second, the association between sexual orientation and smoking during pregnancy differed by race-ethnicity: sexual minority status was more strongly associated with smoking among Latina women, compared to White women. Finally, the subgroup with the highest rates of smoking during pregnancy was bisexual White women. These findings indicate that smoking rates among pregnant sexual minority women warrant attention (regardless of race-ethnicity), particularly as births within this group are rising. It is important to address structural factors that may create more stress for sexual minority women, since smoking is often a response to stress. These findings also highlight the role of heterogeneity: low smoking rates among pregnant Latina women mask within-group disparities.

Prevalence and Sociodemographic Correlates of Identifying as Mainly Heterosexual: Stability and Change across Three Cohorts of Australian Women.

In recent decades, the ways in which sexual minorities identify have changed dramatically. In response, social and health surveys have begun offering a greater range of response options within sexual orientation questions-for example, intermediate categories for "mainly heterosexual" and "mainly lesbian/gay" alongside the more common response options of "heterosexual," "bisexual," and "lesbian/gay." Recent studies indicate that women who identify as "mainly heterosexual" report poorer health, greater health-risk behaviors, and higher rates of victimization than women identifying as "exclusively heterosexual." However, we know very little about the demographic profile of women who choose the "mainly heterosexual" identity label compared to the adjacent "exclusively heterosexual" or "bisexual" labels or about changes over time in the prevalence and correlates of "mainly heterosexual" identification. This study addressed these knowledge gaps by modeling unique, high-quality survey data from three national cohorts of Australian women (Australian Longitudinal Study on Women's Health, 2000-2017, n = 76,930 observations). Consistent with the facilitative environments model, we document stark cross-cohort increases in the percentage of Australian women identifying as "mainly heterosexual"-from ∼1% of those born in 1946-1951 to ∼26% of those born in 1989-1995, coinciding with comparable declines in the percentage of women identifying as "exclusively heterosexual." We also found evidence of cohort differences in the associations between key sociodemographic factors-such as age, education, and socioeconomic status-and the likelihood of women identifying as "mainly heterosexual." Finally, our results indicate that same-sex sexual attractions were more strongly associated with "mainly heterosexual" identification than was same-sex sexual behavior.

Sexual Identity and Birth Outcomes: A Focus on the Moderating Role of Race-ethnicity.

Race-ethnic disparities in birth outcomes are well established, and new research suggests that there may also be important sexual identity disparities in birth weight and preterm birth. This study uses the National Longitudinal Study of Adolescent to Adult Health and is the first to examine disparities in birth outcomes at the intersection of race-ethnicity and sexual identity. We use ordinary least sqaures and logistic regression models with live births (n = 10,318) as the unit of analysis clustered on mother ID (n = 5,105), allowing us to adjust for preconception and pregnancy-specific perinatal risk factors as well as neighborhood characteristics. Results show a striking reversal in the effect of lesbian or bisexual identity on birth outcomes across race-ethnicities: For white women, a bisexual or lesbian identity is associated with better birth outcomes than their white heterosexual counterparts, but for Black and Latina women, it is associated with worse birth outcomes than their heterosexual peers.