The American Osteopathic Board of Obstetrics and Gynecology (AOBOG) is an organization that provides board certification to qualified Doctors of Osteopathic Medicine (D.O.) who specialize in the care of the female reproductive tract and children during the course of pregnancy, childbirth, and the postnatal period (obstetricians) and to qualified Doctors of Osteopathic Medicine who specialize in the diagnosis and treatment of diseases of the female reproductive tract (gynecologists). The board is one 18 medical specialty certifying boards of the American Osteopathic Association Bureau of Osteopathic Specialists approved by the American Osteopathic Association (AOA), and was established in 1942. As of December 2011, 1,082 osteopathic obstetricians and gynecologists held active certification