1. The branch of medicine and obstetrics that deals with the fetus and newborn infant, especially during the period from about 20 weeks of pregnancy through the first 28 days after birth.
Usage: medical field; also called perinatal medicine

Examples

• She specialized in perinatology to help high-risk pregnancies and newborns.
• Perinatology combines obstetrics and neonatology to provide comprehensive care.
• The perinatology unit at the hospital handles complicated deliveries.
• Advances in perinatology have improved survival rates for premature infants.
• A perinatologist monitors both mother and baby during critical pregnancy stages.