Article: Characteristics of Marijuana Use During Pregnancy — Eight States, Pregnancy Risk Assessment Monitoring System, 2017
The American College of Obstetricians and Gynecologists and the American Academy of Pediatrics recommend refraining from marijuana use during pregnancy and lactation because evidence on safety and health effects are inconclusive or insufficient. Potential harmful effects such as low birth weight have been documented. In this 2017 study among 8 states 9.8% of women reported marijuana use before pregnancy, 4.2% during pregnancy, and 5.5% after pregnancy. The authors note that "Continued public education on the available science regarding the benefits and harms of cannabis use overall and during pregnancy is important."