Perinatal stress refers to the stress experienced by women during pregnancy and the postpartum period. This stress can be triggered by a variety of factors, such as financial difficulties, relationship problems, and health concerns. Perinatal stress has been linked to negative outcomes for both the mother and the developing fetus, including pre-term birth, low birth weight, and increased risk of developmental delays in the child. Research in this area aims to understand the impact of perinatal stress on maternal and child health, and to develop interventions to support pregnant women and new mothers in managing their stress levels.