Obstetrics & Gynecology is a peer-reviewed medical journal in the field of obstetrics and gynecology. It is the official publication of the American College of Obstetricians and Gynecologists. It is popularly known as the "Green Journal"

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.