Final answer:
The most significant predictor of postpartum depression is a history of depression or anxiety before or during pregnancy.
Step-by-step explanation:
Postpartum depression is a condition that affects some women after giving birth. Several studies have looked at predictors of postpartum depression, and the most significant predictor appears to be a history of depression or anxiety before or during pregnancy. For example, a study by Wisner et al. (2013) found that women who had thoughts of self-harm and a diagnosis of depression during pregnancy were more likely to experience postpartum depression. Another study by Halligan et al. (2007) found that disturbances in morning cortisol secretion (a stress hormone) in mothers with postnatal depression predicted subsequent depressive symptoms in their adolescent children. It is important to note that there may be other factors, such as social support, sleep deprivation, and hormonal changes, that can also contribute to postpartum depression. However, a history of depression or anxiety appears to be the most consistent predictor.