Founded in 1951, the American College of Obstetricians and Gynecologists is the specialty's premier professional membership organization dedicated to the improvement of women’s health. With more than 58,000 members, the College is a 501(c)(6) organization and its activities include producing the College's practice guidelines and other educational material.

Fellows of ACOG are board certified ob-gyns whose professional activities are devoted to the practice of obstetrics and/or gynecology, who possess unrestricted licenses to practice medicine, and have attained high ethical and professional standing. Fellows of ACOG can be recognized by the designation of FACOG (Fellow, American College of Obstetricians and Gynecologists) after the physician’s name. There are also several other categories of membership.