Obstetrician/gynecologists (OB/GYNs) care for the female reproductive system and associated disorders. This field of medicine encompasses a wide array of care, including the care of pregnant women, gynecologic care, oncology, surgery, and primary health care for women.
Several subspecialties within obstetrics and gynecology include the following:
- Female pelvic medicine and reconstructive surgery
- Gynecologic oncology
- Maternal-fetal medicine
- Reproductive endocrinologists and infertility
(definition from here)