Marijuana Use During Pregnancy and Lactation [2017] American Congress of Obstetricians and Gynecologists American College of Obstetricians and Gynecologists published The American College of Obstetrician and Gynecologists published Marijuana Use During Pregnancy and Lactation according to the ACOG. ACOG's committee opinion American Congress of Obstetricians and Gynecologists 2–5 percent ACOG Marijuana Use During Pregnancy and Lactation American Congress of Obstetricians and Gynecologists (ACOG) recommendations opinion American Congress of Obstetricians and Gynecologists American Congress of Obstetricians and Gynecologists published American College of Obstetricians and Gynecologists American College of Obstetricians and Gynecologists American College of Obstetricians and Gynecologists Marijuana Use During Pregnancy and Lactation committee opinion on cannabis use during pregnancy