A century of obstetrics.
D001803:Blood Transfusion / Q000266:history; D002585:Cesarean Section / Q000266:history; D049672:History, 19th Century; D049673:History, 20th Century; D008880:Midwifery / Q000266:history; D009747:Nutritional Physiological Phenomena; D009774:Obstetrics / Q000266:history*; D010406:Penicillins / Q000266:history; D011295:Prenatal Care / Q000266:history; D013449:Sulfonamides / Q000266:history
D010406:Penicillins; D013449:Sulfonamides