“…Factors associated with postpartum depression include physical characteristics, psychosocial and family background, psychiatric history, nutrition, sleep, baby status, experiences during pregnancy and delivery, mode of delivery, medical interventions, and complications; such as age, obesity and overweight, marital status, violence and abuse, immigration status, race, depressive history, vitamin D de ciency, sleep disruption and poor sleep, life events during pregnancy, lack of social support, parity, cesarean section, multiple births, preterm and low-birth-weight infants, negative birth experience, and postpartum anemia [8,9] . Among these risk factors, in particular, that poor postpartum sleep quality is a predictor of depressive symptoms [10,11] .…”