Obstetrical nursing is the specialized field of nursing that includes caring for pregnant women during labor, delivery, and postpartum period. This field requires extensive knowledge of maternal and fetal health, physical assessments, and therapeutic interventions. Synonyms for obstetrical nursing include maternal nursing, perinatal nursing, midwifery nursing, and obstetric nursing. Maternal nursing involves caring for women before, during, and after childbirth. Perinatal nursing is focused on the care of women and their newborns during the transition period from pregnancy to parenthood. Midwifery nursing involves the care of women during childbirth and postpartum period. And obstetric nursing refers to the care of women during labor, delivery, and postpartum period.