Objective: To estimate how social support and social conflict relate to prenatal depressive symptoms and to generate a brief clinical tool to identify women at increased psychosocial risk. Methods: This is a prospective study following 1,047 pregnant women receiving care at two university-affiliated clinics from early pregnancy through 1 year postpartum. Structured interviews were conducted in the second trimester of pregnancy. Hierarchical and logistic regressions were used to examine potential direct and interactive effects of social support and conflict on prenatal depressive symptoms measured by the Center for Epidemiologic Studies-Depression Scale. Results: Thirty-three percent of the sample reported elevated levels of depressive symptoms predicted from sociodemographic factors, social support, and social conflict. Social support and conflict had independent effects on depressive symptoms although social conflict was a stronger predictor. There was a “dose–response,” with each increase in interpersonal risk factor resulting in consequent risk for probable depression based on symptom reports (Center for Epidemiologic Studies-Scale greater than or equal to 16). A composite of one social support and three conflict items were identified to be used by clinicians to identify interpersonal risk factors for depression in pregnancy. Seventy-six percent of women with a composite score of three or more high-risk responses reported depressive symptoms. Conclusion: Increased assessment of social support and social conflict by clinicians during pregnancy can identify women who could benefit from group or individual interventions to enhance supportive and reduce negative social interactions.

Few interventions have succeeded in reducing psychosocial risk among pregnant women. The objective of this study was to determine whether an integrated group prenatal care intervention already shown to improve perinatal and sexual risk outcomes can also improve psychosocial outcomes compared to standard individual care. This randomised controlled trial included pregnant women ages 14-25 from two public hospitals (N=1047) who were randomly assigned to standard individual care, group prenatal care or integrated group prenatal care intervention (CenteringPregnancy Plus, CP+). Timing and content of visits followed obstetrical guidelines, from 18-week gestation through birth. Each 2-h group prenatal care session included physical assessment, education/skills building and support via facilitated discussion. Using intention-to-treat models, there were no significant differences in psychosocial function; yet, women in the top tertile of psychosocial stress at study entry did benefit from integrated group care. High-stress women randomly assigned to CP+ reported significantly increased self-esteem, decreased stress and social conflict in the third trimester of pregnancy; social conflict and depression were significantly lower 1-year postpartum (all p-values < 0.02). CP+ improved psychosocial outcomes for high-stress women. This 'bundled' intervention has promise for improving psychosocial outcomes, especially for young pregnant women who are traditionally more vulnerable and underserved.