Women who are pregnant or contemplating pregnancy should be encouraged to discontinue marijuana use, according to new recommendations from the American College of Obstetricians and Gynecologists (ACOG). The committee opinion offers recommendations based on updated data and supporting evidence regarding marijuana use and neonatal outcomes. Recommendations include:

• Before pregnancy and in early pregnancy, all women should be asked about their use of tobacco, alcohol, and other drugs, including marijuana and other medications used for nonmedical reasons.
• Women reporting marijuana use should be counseled about concerns regarding potential adverse health consequences of continued use during pregnancy.
• Women who are pregnant or contemplating pregnancy should be encouraged to discontinue marijuana use.
• Pregnant women or women contemplating pregnancy should be encouraged to discontinue use of marijuana for medicinal purposes in favor of an alternative therapy for which there are better pregnancy-specific safety data.
• There are insufficient data to evaluate the effects of marijuana use on infants during lactation and breastfeeding, and in the absence of such data, marijuana use is discouraged.