Gynecology (gy-ne-cahl-o-gee)The branch of medicine that deals with the diseases and routine physical care of the reproductive system of women.

Obstetrics (Ahb-ste-triks) The branch of medicine that deals with childbirth.

Perinatology (pear-E-nA-tah-lah-jE) Perinatologists, also called maternal and fetal physicians, work with patients who have pregnancy complications that may pose an increased risk to mother or baby.

Neonatology (Neo-nA-tah-lah-gee) A subspecialty of pediatrics that consists of the medical care of the ill or premature newborn infant.