Early Life Adversity alters Maternal-Fetal-Placental Biology and may Propagate Population Health Disparities

Abstract

Research findings dating back decades indicate that prenatal maternal psychological distress can predict poor child health outcomes, with potentially lasting effects. These results have been extensively replicated and have encouraged longitudinal cohort studies to begin before birth; many clinical interventions to promote maternal health in pregnancy are underway. Studies of prenatal maternal distress emphasize in utero effects, likely arising from multiple biological changes. Alternatively, developmental and life history models suggest that prenatal distress likely has pre-pregnancy developmental origins. Studies linking pre-pregnancy adversity to prenatal maternal distress and maternal-fetal-placental biology are underway, but are typically limited in scope. The ECHO-UPSIDE cohort is well-positioned to contribute novel data to this area; it is a prospective pregnancy cohort study of a socio-economically and racially/ethnically diverse sample at elevated psychosocial risk but normal medical risk status (Rochester, NY; n=326). Clinical, socio-demographic, health data and extensive biological samples were collected at each trimester and placentae were collected at birth. Women who experienced higher adversity in early childhood (using Adverse Childhood Experiences [ACE] scale) reported wide-spread differences in prenatal health, with moderate effect sizes (Cohen’s d>.5) for depressive and anxiety symptoms, stress, body mass index (BMI), sleep disturbance, and diet. Higher ACE scores predicted altered (flatter) diurnal cortisol pattern throughout pregnancy (p<.01). There was also limited but significant impact on maternal immune activation from specific immune markers and measures of placenta structure and function. The studies demonstrate potential pathways through which pre-pregnancy adversity may propagate persisting health disparities.