Unformatted text preview: • Stretching of the uterus stimulates oxytocin secretion, which stimulates uterine contractions. The Newborn Respiratory and Circulatory Changes o Inflation of the lungs at birth results in closure of the foramen ovale and the ductus arteriosus. o When the umbilical cord is cut, blood no longer flows through the umbilical vessels. Digestive Changes o The newborn digestive system only gradually develops the ability to digest a variety of foods. Lactation • Estrogens and progesterone help stimulate the growth of the breasts during pregnancy. • Suckling stimulates prolactin and oxytocin synthesis. Prolactin stimulates milk production, and oxytocin stimulates milk "letdown."...
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- Fall '10
- Anthropology, progesterone, Oxytocin, oxytocin stimulates milk, stimulates prolactin