What does OB stand for?
OB/GYN: A commonly used abbreviation. OB is short for obstetrics or for an obstetrician, a physician who delivers babies. GYN is short for gynecology or for a gynecologist, a physician who specializes in treating diseases of the female reproductive organs.
What exactly does a gynecologist do?
A gynecologist treats patients with female reproductive organs, whether or not they identify as women. An obstetrician is a kind of gynecologist who specializes in pregnancy and childbirth.