Relationships between psychosocial stressors among pregnant women in San Francisco: A path analysis

Family Nursing Care during the Transition to Parenthood: A Scoping Review

BACKGROUND

Family-centered care places the family at the core of care, with family nurses playing a pivotal role in supporting and guiding members through pregnancy and the transition to parenthood and acknowledging the significant adjustments during these phases.

AIM

To map the evidence concerning family nurses' care for families during the transition to parenthood.

METHOD

The scoping review followed the Joanna Briggs Institute (JBI) methodology, focusing on family-centered care during pregnancy adaptation and the initial months of parenthood. Using a PCC (population, concept, and context) strategy, the research covered various databases: Scopus; Web of Science; and CINAHL Complete, MedLine Complete, and MedicLatina by EBSCOhost.

RESULTS

A Preferred Reporting Items for Systematic Reviews and Meta-analyses extension for Scoping Reviews (PRISMA-ScR) flow diagram was used to present the results. Eighteen articles were included, mainly from the Middle East and Europe, including cross-sectional studies and reviews. Key findings addressed the transitioning process to parenthood, the impact of family characteristics, and the role of family nurses in enhancing these processes.

CONCLUSION

Home care is considered vital during this transition. Family nursing should concentrate on both individuals and the parental subsystem, addressing social determinants equitably. Through these efforts, they empower families to establish an optimal environment for children's development.

Do Stressful Events and Racial Discrimination Explain Racial Gaps in Exclusive Breastfeeding Duration? A Qualitative Interview Study with Black, Hispanic, and White Mothers Living in Ohio

OBJECTIVES

This study aimed to understand why breastfeeding and exclusive breastfeeding rates substantially decrease shortly after birth among mothers in the USA. Specifically, we aimed to illuminate the impact of stressful life events and racial discrimination on mothers' breastfeeding behaviors and duration.

METHODS

We conducted a qualitative analysis of semi-structured telephone interviews with women (N = 66; 47 White, 16 Black, and 3 Hispanic) who gave birth between 2019 and 2021 in Ohio. Interviews were conducted between March 2022 and May 2022. Interviews were digitally recorded, transcribed verbatim, analyzed, coded, and organized into themes.

RESULTS

After thematic analysis of the data, five key themes were identified: (1) stress, (2) breastfeeding barriers, (3) policy and system change to support breastfeeding mothers, (4) racial discrimination, and (5) breastfeeding motivators. Our study found that the breastfeeding experience was both a positive bonding experience and a challenging practice, characterized by physical, mental, and sociocultural struggles.

CONCLUSION FOR PRACTICE

Addressing stress during pregnancy, equitable access to culturally sensitive lactation support, improved parental leave, and enhanced workplace breastfeeding regulations are essential to increasing breastfeeding duration among racially marginalized women.

Psychosocial Stressors as a Determinant of Maternal Cardiovascular Health During Pregnancy

Maternal psychosocial stress may be a risk factor for poor cardiovascular health (CVH) during pregnancy. We aimed to identify classes of psychosocial stressors in pregnant women and to evaluate their cross-sectional association with CVH. We performed a secondary analysis of women from the Nulliparous Pregnancy Outcomes Study: Monitoring Mothers-to-be (nuMoM2b) cohort (2010 to 2013). Latent class analysis was used to identify distinct classes of exposure to psychosocial stressors based on psychological (stress, anxiety, resilience, depression) and sociocultural indicators (social support, economic stress, discrimination). Optimal and suboptimal CVH was defined based on the presence of 0 to 1 and ≥2 risk factors (hypertension, diabetes mellitus, smoking, obesity, inadequate physical activity), respectively based on the American Heart Association Life's Essential 8. We used logistic regression to evaluate the association between psychosocial classes and CVH. We included 8,491 women and identified 5 classes reflective of gradations of psychosocial stress. In unadjusted models, women in the most disadvantaged psychosocial stressor class were approximately 3 times more likely to have suboptimal CVH than those in the most advantaged class (odds ratio 2.98, 95% confidence interval: 2.54 to 3.51). Adjusting for demographics minimally attenuated the risk (adjusted odds ratio 2.09, 95% confidence interval: 1.76 to 2.48). We observed variation across psychosocial stressor landscapes in women in the nuMoM2b cohort. Women in the most disadvantaged psychosocial class had a greater risk of suboptimal CVH which was only partially explained by differences in demographic characteristics. In conclusion, our findings highlight the association of maternal psychosocial stressors with CVH during pregnancy.

What is prenatal stress? A scoping review of how prenatal stress is defined and measured within the context of food insecurity, housing instability, and immigration in the United States

BACKGROUND

Stress during pregnancy can lead to significant adverse outcomes for maternal mental health. Early evaluation of prenatal stress can help identify treatment needs and appropriate interventions. Disparities in the social determinants of health can contribute to stress, but what constitutes stress during pregnancy within the social determinants of health framework is poorly understood.

OBJECTIVE

To scope how prenatal stress is defined and measured among pregnant people exposed to three prominent social stressors in the United States: insecurity pertaining to food, housing, and immigration.

ELIGIBILITY CRITERIA

We included all studies that focused on stress during pregnancy in the context of food insecurity, housing instability, and immigration, given their recent policy focus due to the COVID-19 pandemic and ongoing political discourse, in addition to their importance in American College of Obstetricians and Gynecologists (ACOG's) social determinants of health screening tool.

SOURCES OF EVIDENCE

We searched PubMed, Scopus, and Web of Science for articles published between January 2012 and January 2022.

CHARTING METHODS

Using a piloted charting tool, we extracted relevant study information from the selected articles and analyzed the content pertaining to stress.

RESULTS

An initial search identified 1,023 articles, of which 24 met our inclusion criteria. None of the studies defined prenatal stress, and only one used the Prenatal Distress Questionnaire, a prenatal stress-specific tool to measure it. The Perceived Stress Scale was the most common instrument used in seven studies. Fifteen studies measured over 25 alternative exposures that researchers theorized were associated with stress, and 4 of the 15 studies did not explain the association between the measure and stress.

CONCLUSIONS

Our findings demonstrate a fundamental inconsistency in how prenatal stress is defined and measured in the context of social determinants of health, limiting the comparison of results across studies and the potential development of effective interventions to promote better maternal mental health.

A qualitative exploration of experiences accessing community and social services among pregnant low-income people of color during the COVID-19 pandemic

BACKGROUND

The COVID-19 pandemic has been associated with increased social and economic stressors among pregnant individuals. While community and social services have been available to mitigate stressors in pregnancy (e.g. food insecurity and financial hardship) and reduce the risk of adverse maternal outcomes, it is unclear how the pandemic impacted access to these resources, particularly in communities of color with lower incomes.

OBJECTIVE

To examine the experiences accessing community and social service resources during the COVID-19 pandemic among pregnant people of color with low incomes.

DESIGN

Participants for this COVID-related qualitative study were recruited from two sources-a prospective comparative effectiveness study of two models of enhanced prenatal care and the California Black Infant Health Program between August and November of 2020.

METHODS

We conducted 62 interviews with Medicaid-eligible participants in California's Central Valley. During their interviews, study participants were asked to share their pregnancy-related experiences, including how they felt the pandemic had affected those experiences.

RESULTS

We identified two broad themes: challenges with accessing community and social service resources during the pandemic and opportunities for improving access to these resources. Sub-themes related to challenges experienced included difficulty with remote access, convoluted enrollment processes for community and social services, and problems specific to accessing COVID-19 resources (e.g. testing). Sub-themes related to opportunities to improve access included leveraging instrumental support from perinatal staff and informational (e.g. practical) support from other community programs and pregnant peers. Participant recommendations included leveraging opportunities to improve client experiences through increased transparency and better patient-provider communication.

CONCLUSION

This study highlights some important trends that emerged with the rollout of remote service delivery for social services among a vulnerable population. Many participants were able to leverage support through other programs and perinatal staff. These individuals identified additional opportunities to improve client experiences that can inform the future implementation of support services for pregnant people.

Neighborhood conditions and birth outcomes: Understanding the role of perceived and extrinsic measures of neighborhood quality

Living in a disadvantaged neighborhood has been associated with adverse birth outcomes. Most prior studies have conceptualized neighborhoods using census boundaries and few have examined the role of neighborhood perceptions, which may better capture the neighborhood environment. In the present study, we examined associations between extrinsic and perceived neighborhood quality measures and adverse birth outcomes.

Methods

Participants resided in the San Francisco Bay Area of California and were enrolled in Chemicals in Our Bodies, a prospective birth cohort (N = 817). The Index of Concentration at the Extremes (ICE) for income, Area Deprivation Index (ADI), and the Urban Displacement Project's measure of gentrification were included as census block group-level extrinsic neighborhood quality measures. Poor perceived neighborhood quality was assessed using an interview questionnaire. Linear regression models were utilized to examine associations between extrinsic and perceived neighborhood quality measures, and gestational age and birthweight for gestational age z-scores. Covariates in adjusted models were chosen via a directed acyclic graph (DAG) and included maternal age, education, and marital status.

Results

In adjusted models, having poor perceived neighborhood quality was associated with higher birthweight z-scores, relative to those who did not perceive their neighborhood as poor quality (β = 0.21, 95% confidence intervals = 0.01, 0.42). Relative to the least disadvantaged tertile, the upper tertile of the ADI was associated with a modest reduction in gestational age (β = -0.35, 95% confidence intervals = -0.67, -0.02).

Conclusions

In the Chemicals in Our Bodies study population, extrinsic and perceived neighborhood quality measures were inconsistently associated with adverse birth outcomes.

Stress during pregnancy: An ecological momentary assessment of stressors among Black and White women with implications for maternal health

BACKGROUND

Stress can lead to adverse physiological and psychological outcomes. Therefore, understanding stress during pregnancy provides insight into racial disparities in maternal health, particularly Black maternal health.

OBJECTIVES

This study aimed to describe (1) daily exposure to self-reported stress levels during pregnancy, and (2) sources of stress among participants that identified as Black or White using data collected via ecological momentary assessment.

METHODS

We leveraged survey data from the Postpartum Mothers Mobile Study, a prospective longitudinal study using ecological momentary assessment data collection methods to describe patterns of stress during pregnancy. This article is descriptive and documents patterns of self-reported stress levels and sources of stress. Frequencies and percentages of stress responses were computed to describe these patterns.

RESULTS

The sample (n = 296) was 27% Black (n = 78) and 63% White (n = 184). Results were based on at least one measurement of that stress level during pregnancy. A similar number of Black and White participants reported no stress during pregnancy. White (85%-95%) and Black (60%-70%) participants reported low to moderate levels of stress. Black participants (38%) and White participants (35%) reported experiencing high stress. Black and White participants reported similar sources of stress: stress from a partner, too many things to do, a baby or other children, and financial concerns. White participants reported work as a top stressor, and Black participants reported financial issues as a top source of stress.

CONCLUSION

This study provides insight into daily exposure to stress that has implications for maternal health. We described patterns of self-reported stress and sources of stress among Black and White participants. The daily exposures to stress reported by this sample exist within a context of root causes of structural inequities in education, health care, income, wealth, and housing that must be addressed to achieve maternal health equity.

Perceived stress and COVID-19-related stressors: the moderating role of social support during pregnancy

Recent evidence on perceived stress during the COVID-19 pandemic shows that birthing people experienced stress from pandemic-related stressors. While psychosocial stress is a significant predictor of adverse birth outcomes, social support can reduce stress levels during pregnancy. This study examined social support moderation of relationships between COVID-19-related stressors and perceived stress during pregnancy. The analysis included data from publicly insured pregnant participants who were enrolled in a randomized control trial of two enhanced prenatal care models in Fresno, California, and completed a third-trimester questionnaire between April and August 2020 (n = 77). Multivariate linear regression was used to estimate the associations between perceived stress and COVID-19-related stressors and social support moderation. COVID-19-related stressors related to childcare and tension at home remained significantly associated with perceived stress adjusting for sociodemographic characteristics and other COVID-19-related stressors. Social support moderated the relationship between perceived stress and loss of childcare (β = 2.4, 95 percent CI = 0.5-4.3, p = .014). Overall, social support moderated the association between COVID-19 stressors and perceived stress. While social support is commonly conceptualized as protective, the finding of greater stress around childcare among individuals reporting greater social support suggests complexity for leveraging these support networks during the pandemic.

Work stressors and coping strategies of expecting and employed women in Germany: A cross-sectional study

BACKGROUND: Research indicates pregnancy-related discrimination as a potential stressor during pregnancy for women at work, which may result in perceptions of occupational stress. OBJECTIVE: The aim of this study was to examine women’s perceptions of pregnancy-related stressors at work, problem- and emotion-focused coping strategies as well as attributed consequences for mental, physical and social dimensions. METHODS: The survey was completed online with a cross-sectional study design. Inclusion criteria for study participation were being at least 18 years old, currently pregnant and engaged in paid work (regardless of full-time or part-time work). Women were recruited via social media and with the support of pro familia. RESULTS: Results indicate that 79 (53.4%, n = 148) participating women experienced pregnancy-related stressors at work. The most relevant kinds of stressors were intrapersonal stressors and interpersonal stressors related to employers or colleagues. The most prevalent coping strategy was to seek social support or advice from gynaecologists. Attributed physical consequences were exhaustion, fatigue and sleeping disorders. Mental health consequences were named in terms of feeling emotionally upset and having fears related to the baby’s health. CONCLUSIONS: Family-friendly support policies need to be further developed and topics like pregnancy-related stressors need to be addressed in an occupational context. Especially the perspective and knowledge of employers on the topic needs to be strengthened e.g. to ensure an ongoing communication between employers, HR and employees during pregnancy. Further research is needed which provides representative data, analyses employer’s experiences and their attitudes in managing pregnancies as well as consequences for women when returning to work.

Trends in Binge Drinking and Heavy Alcohol Consumption Among Pregnant Women in the US, 2011 to 2020

This cross-sectional study compares trends in the prevalence of binge drinking and heavy alcohol consumption among pregnant and nonpregnant women from 2011 through 2020.

Psychological Stress Perceived by Pregnant Women in the Last Trimester of Pregnancy

Pregnancy is characterized by changes in neuroendocrine, cardiovascular, and immune function. For this reason, pregnancy itself is perceived as a psychological “stress test”. Research to date has focused on stress exposure. The aim of the study was to evaluate the influence of associated factors on the level of stress experienced by pregnant patients. We conducted a prospective study that included 215 pregnant women in the third trimester of pregnancy, hospitalized in the Obstetrics and Gynecology Clinic II in Târgu-Mureș, between December 2019 and December 2021, who were evaluated by the ABS II scale. All patients included in the study filled in a questionnaire that included 76 questions/items, in which all the data necessary for the study were recorded. The results obtained from the study showed that pregnant women in urban areas (53.49%) are more vulnerable than those in rural areas (46.51%), being influenced by social and professional stressors, social determinants playing a critical role in pregnancy and in the newborn. Patients who have had an imminent abortion in their current pregnancy have a significantly higher score of irrationality than those with normal pregnancy, which shows that their emotional state can negatively influence the phenomenon of irrationality. There is a statistically significant association between pregnancy type I (normal pregnancy or imminent pregnancy) and irrationality class (p = 0.0001; RR: 2.150, CI (95%): 1.154−4.007). In the case of women with desired pregnancies, the risk of developing irrationality class IV−V is 4.739 times higher, with the association being statistically significant (p < 0.0001; RR 4.739; CI (95%): 2.144−10.476). The analysis of the obtained results demonstrates the importance of contributing factors and identifies the possibility of stress disorders, occurring in the last trimester of pregnancy, disorders that can have direct effects on maternal and fetal health. We consider it extremely important to carry out evaluations throughout the pregnancy. At the same time, it is necessary to introduce a screening program to provide psychological counseling in the prenatal care of expectant mothers.

Women's Social Well-Being During Pregnancy: Adverse Childhood Experiences and Recent Life Events

BACKGROUND

Adverse experiences during childhood and recent stressful life events are each associated with women's reduced well-being and poorer health during pregnancy. Few studies, however, have focused upon pregnant women's social well-being, and inclusion of both independent variables in the same analysis is rare. This study focuses upon adverse experiences during childhood as well as recent life events in relationship to four aspects of social well-being: social support, couple aggression for partnered women, neighborhood safety, and food insecurity.

MATERIALS AND METHODS

A diverse community sample of 176 pregnant women completed questionnaires during their third trimester. A cross-sectional design was used that included retrospective reports of childhood experiences, as well as reports of recent life events and current well-being.

RESULTS

Adverse experiences during childhood were uniquely associated with couple aggression (β = 0.206, p = 0.026) and lower neighborhood safety (β = -0.185, p = 0.021). Recent stressful life events were uniquely associated with lower social support (β = -0.247, p = 0.001) and greater food insecurity (β = 0.494, p = 0.000). For social support and food insecurity, there was a significant indirect pathway from adverse childhood experiences through recent stressful life events. Adverse child experiences and recent stressful life events did not interact.

CONCLUSIONS

A life-course perspective that considers women's experiences across their life span is critical for use by both researchers and health practitioners. Adverse childhood experiences and recent stressful life events are important for understanding social features of pregnant women's daily lives.

Prenatal PFAS and psychosocial stress exposures in relation to fetal growth in two pregnancy cohorts: Applying environmental mixture methods to chemical and non-chemical stressors

BACKGROUND

Prenatal exposure to individual per‑ and poly‑fluoroalkyl substances (PFAS) and psychosocial stressors have been associated with reductions in fetal growth. Studies suggest cumulative or joint effects of chemical and non-chemical stressors on fetal growth. However, few studies have examined PFAS and non-chemical stressors together as a mixture, which better reflects real life exposure patterns. We examined joint associations between PFAS, perceived stress, and depression, and fetal growth using two approaches developed for exposure mixtures.

METHODS

Pregnant participants were enrolled in the Chemicals in Our Bodies cohort and Illinois Kids Development Study, which together make up the ECHO.CA.IL cohort. Seven PFAS were previously measured in 2nd trimester maternal serum samples and were natural log transformed for analyses. Perceived stress and depression were assessed using self-reported validated questionnaires, which were converted to t-scores using validated methods. Quantile g-computation and Bayesian kernel machine regression (BKMR) were used to assess joint associations between PFAS, perceived stress and depression t-scores and birthweight z-scores (N = 876).

RESULTS

Individual PFAS, depression and perceived stress t-scores were negatively correlated with birthweight z-scores. Using quantile g-computation, a simultaneous one quartile increase in all PFAS, perceived stress and depression t-scores was associated with a slight reduction in birthweight z-scores (mean change per quartile increase = -0.09, 95% confidence interval = -0.21,0.03). BKMR similarly indicated that cumulative PFAS and stress t-scores were modestly associated with lower birthweight z-scores. Across both methods, the joint association appeared to be distributed across multiple exposures rather than due to a single exposure.

CONCLUSIONS

Our study is one of the first to examine the joint effects of chemical and non-chemical stressors on fetal growth using mixture methods. We found that PFAS, perceived stress, and depression in combination were modestly associated were lower birthweight z-scores, which supports prior studies indicating that chemical and non-chemical stressors are jointly associated with adverse health outcomes.

Prevalence, associated factors and perinatal outcomes of antepartum depression in Ibadan Nigeria

Background

Antepartum depression is the most common mental health disorder in pregnancy and it is also a risk factor for adverse perinatal outcomes. Low and middle income countries like Nigeria bear a higher burden of antepartum depression compared with high income countries. Prioritizing mental health issues among pregnant women is crucial to achieving the Sustainable Development Goals. We determined the prevalence, associated factors and perinatal outcomes of antepartum depression among pregnant women in Ibadan, Nigeria.

Methods

A prospective cohort study was conducted among 1745 pregnant women enrolled early in pregnancy (≤ 20 weeks) at four comprehensive obstetric facilities within Ibadan metropolis. Antepartum depression was ascertained during the third trimester using the Edinburg Postpartum Depression Scale ≥ 12. The primary exposure was antepartum depression and the outcome variables were the perinatal outcomes. The associated factors assessed included sociodemographic, obstetric, psychological, and lifestyle characteristics. Bi-variate logistic and Poisson regression analyses were used to assess the factors and relative risk for perinatal outcomes of antepartum depression.

Results

The prevalence of antepartum depression was 14.1%. The significant factors associated with APD after adjusting for confounders were: high income (≥ 20, 000) which was protective (AOR) = 0.59; 95% CI: (0.40 – 0.88); p-value: 0.010] and perceived stress increased the odds of APD in a monotonic fashion: moderate stress [AOR = 2.39; 95% CI: (1.01 – 5.7); p-value: 0.047], high stress [AOR = 6.43; 95% CI: (2.28 – 18.2); p-value: < 0.001]. Preterm delivery was the only significant perinatal outcome [Relative Risk (RR) = 1.66; 95% CI (1.14 – 2.39); p-value =  0.007]. Depression did not increase the risk of having low birth weight babies (p = 0.513), macrosomia (p = 0.894), birth asphyxia (p = 0.317), and caesarean section (p = 0.298).

Conclusions

APD was prevalent among our study population. The significant factors identified in this study can be targeted to reduce the occurrence of APD among pregnant women in Nigeria through appropriate social and public health interventions which include APD screening, counselling, and the provision of emotional support for pregnant women during antenatal care.

Joint effects of prenatal exposure to per- and poly-fluoroalkyl substances and psychosocial stressors on corticotropin-releasing hormone during pregnancy

BACKGROUND

Prenatal exposure to per- and poly-fluoroalkyl substances (PFAS) and psychosocial stressors has been associated with adverse pregnancy outcomes, including preterm birth. Previous studies have suggested that joint exposure to environmental chemical and social stressors may be contributing to disparities observed in preterm birth. Elevated corticotropin-releasing hormone (CRH) during mid-gestation may represent one biologic mechanism linking chemical and nonchemical stress exposures to preterm birth.

METHODS

Using data from a prospective birth cohort (N = 497), we examined the cross-sectional associations between five individual PFAS (ng/mL; PFNA, PFOA, PFOS, PFHxS, and Me-PFOSA-AcOH) and CRH (pg/mL) using linear regression. PFAS and CRH were measured during the second trimester in serum and plasma, respectively. Coefficients were standardized to reflect change in CRH associated with an interquartile range (IQR) increase in natural log-transformed PFAS. We additionally examined if the relationship between PFAS and CRH was modified by psychosocial stress using stratified models. Self-reported depression, stressful life events, perceived stress, food insecurity, and financial strain were assessed using validated questionnaires during the second trimester and included as binary indicators of psychosocial stress.

RESULTS

An IQR increase in PFNA was associated with elevated CRH (β = 5.17, 95% confidence interval [CI] = 1.79, 8.55). Increased concentrations of PFOA were also moderately associated with CRH (β = 3.62, 95% CI = -0.42, 7.66). The relationship between PFNA and CRH was stronger among women who experienced stressful life events, depression, food insecurity, and financial strain compared to women who did not experience these stressors.

CONCLUSIONS

This cross-sectional study is the first to examine the relationship between PFAS exposure and CRH levels in mid-gestation. We found that these associations were stronger among women who experienced stress, which aligns with previous findings that chemical and nonchemical stressor exposures can have joint effects on health outcomes.

Prenatal Exposure to Favorable Social and Environmental Neighborhood Conditions Is Associated with Healthy Pregnancy and Infant Outcomes

Neighborhood and individual level risks commonly co-occur for pregnant women and may cumulatively contribute to birth outcomes. Moreover, the relationship between favorable social and environmental neighborhood conditions and perinatal outcomes has been understudied. This study considered the accumulated impact of prenatal exposure to positive neighborhood social, environmental, and educational conditions in relation to maternal health during pregnancy and birth size outcomes. In a prospective study of a multi-ethnic and socioeconomically diverse cohort (n = 239) of pregnant women and their infants, neighborhoods were characterized by the Child Opportunity Index (COI), a census-tract composite indicator representing favorable social, environmental, and educational community conditions. Adjusted generalized estimating equations showed that favorable neighborhood conditions promoted the growth of longer and heavier infant bodies, and reduced the risk of intrauterine growth restriction. The associations were stronger for female versus male infants, though not significantly different. Moreover, COI was associated with better maternal mental health and diet during pregnancy; diet significantly mediated the association between COI and birth size outcomes. This study underscores the importance of considering the accumulated benefit of neighborhood assets for maternal and infant health. Interventions that capitalizes on the full range of contextual assets in which mothers live may promote pregnancy health and fetal growth.

Associations of Maternal Stress, Prenatal Exposure to Per- and Polyfluoroalkyl Substances (PFAS), and Demographic Risk Factors with Birth Outcomes and Offspring Neurodevelopment: An Overview of the ECHO.CA.IL Prospective Birth Cohorts

BACKGROUND

Infants whose mothers experience greater psychosocial stress and environmental chemical exposures during pregnancy may face greater rates of preterm birth, lower birth weight, and impaired neurodevelopment.

METHODS

ECHO.CA.IL is composed of two cohorts, Chemicals in Our Bodies (CIOB; n = 822 pregnant women and n = 286 infants) and Illinois Kids Development Study (IKIDS; n = 565 mother-infant pairs), which recruit pregnant women from San Francisco, CA and Urbana-Champaign, IL, respectively. We examined associations between demographic characteristics and gestational age, birth weight z-scores, and cognition at 7.5 months across these two cohorts using linear models. We also examined differences in biomarkers of exposure to per- and polyfluoroalkyl substances (PFAS), measured in second-trimester serum, and psychosocial stressors by cohort and participant demographics.

RESULTS

To date, these cohorts have recruited over 1300 pregnant women combined. IKIDS has mothers who are majority white (80%), whereas CIOB mothers are racially and ethnically diverse (38% white, 34% Hispanic, 17% Asian/Pacific Islander). Compared to CIOB, median levels of PFOS, a specific PFAS congener, are higher in IKIDS (2.45 ng/mL versus 1.94 ng/mL), while psychosocial stressors are higher among CIOB. Across both cohorts, women who were non-white and single had lower birth weight z-scores relative to white women and married women, respectively. Demographic characteristics are not associated with cognitive outcomes at 7.5 months.

CONCLUSIONS

This profile of the ECHO.CA.IL cohort found that mothers and their infants who vary in terms of socioeconomic status, race/ethnicity, and geographic location are similar in many of our measures of exposures and cognitive outcomes. Similar to past work, we found that non-white and single women had lower birth weight infants than white and married women. We also found differences in levels of PFOS and psychosocial stressors based on geographic location.

Maternal Experience of Multiple Hardships and Fetal Growth: Extending Environmental Mixtures Methodology to Social Exposures

BACKGROUND

Women can be exposed to a multitude of hardships before and during pregnancy that may affect fetal growth, but previous approaches have not analyzed them jointly as social exposure mixtures.

METHODS

We evaluated the independent, mutually adjusted, and pairwise joint associations between self-reported hardships and birthweight for gestational age z-scores in the Chemicals in Our Bodies-2 prospective birth cohort (N = 510) using G-computation. We examined financial hardship, food insecurity, job strain, poor neighborhood environment, low community standing, caregiving, high burden of stressful life events, and unplanned pregnancy collected via questionnaire administered in the second trimester of pregnancy. We used propensity scores to ensure our analyses had sufficient data support and estimated absolute differences in outcomes.

RESULTS

Food insecurity was most strongly associated with reduced birthweight for gestational age z-scores individually, with an absolute difference of -0.16, 95% confidence interval (CI) -0.45, 0.14. We observed an unexpected increase in z-scores associated with poor perceived neighborhood environment (0.18, 95% CI -0.04, 0.41). Accounting for coexposures resulted in similar findings. The pairwise joint effects were strongest for food insecurity in combination with unplanned pregnancy (-0.45, 95% CI -0.93, 0.02) and stressful life events (-0.42, 95% CI -0.90, 0.05). Poor neighborhood environment in combination with caregiving was associated with an increase in z-scores (0.47, 95% CI -0.01, 0.95).

CONCLUSIONS

Our results are consistent with the hypothesis that experiencing food insecurity during pregnancy, alone and in combination with stressful life events and unplanned pregnancy, may affect fetal growth.