['Early parenthood is a time of chronic sleep disturbance and also of heightened depression risk. Poor sleep quality has been identified both as a predictor of postpartum depressive symptoms and as a consequence.', 'This study sought to clarify causal pathways linking sleep and postpartum depression via longitudinal path modeling. Sleep quality at 6\xa0months postpartum was hypothesized to exacerbate depressive symptoms from 1\xa0month through 1\xa0year postpartum in both mothers and fathers. Within-couple associations between sleep and depression were also tested.', 'Data were drawn from a low-income, racially and ethnically diverse sample of 711 couples recruited after the birth of a child. Depressive symptoms were assessed at 1, 6, and 12\xa0months postpartum, and sleep was assessed at 6\xa0months postpartum.', "For both partnered mothers and fathers and for single mothers, depressive symptoms at 1\xa0month postpartum predicted sleep quality at 6\xa0months, which in turn predicted depressive symptoms at both 6 and 12\xa0months. Results held when infant birth weight, breastfeeding status, and parents' race/ethnicity, poverty, education, and immigration status were controlled. Mothers' and fathers' sleep quality and depressive symptoms were correlated, and maternal sleep quality predicted paternal depressive symptoms both at 6 and at 12\xa0months."] Does sleep Quality predict Persistence of Parental Postpartum Depressive Symptoms and Transmission of Depressive Symptoms from Mothers to Fathers?