This cluster of papers focuses on the impact of maternal mental health, including perinatal depression, prenatal stress, and antenatal anxiety, on offspring's development and well-being. It explores various aspects such as child psychopathology, neurodevelopment, cognitive and behavioral outcomes, as well as the effects of psychological interventions and postpartum psychiatric disorders. The research also delves into the association between parental depression and infant outcomes, emphasizing the significance of maternal mental health during pregnancy and postpartum period.