Cannabis during pregnancy is not supported by the top OB societies: the American College of Obsteticians and Gynecologist (ACOG), Society of Maternal Fetal Medicine (SMFM), and Society of Obstetricians and Gynaecologies of Canada (SOGC), or by MotherToMother due to the lack of safety evidence in the research.

American College of Obstetricians and Gynecologists (ACOG)

ACOG is the premier professional organization that produces practice guidelines to improve women’s health and advocates for members and patients.

"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."

"Patients should also be informed of the potential ramifications of a positive screen result, including any mandatory reporting requirements."

Society of Obstetricians and Gynaecologists of Canada (SOGC)

SOGC's mission is to lead the advancement of women’s health through excellence and collaborative professional practice.

"The Society of Obstetricians and Gynaecologists of Canada (SOGC) is concerned that legalization of cannabis may overshadow a growing body of medical research which suggests that the use of cannabis during pregnancy may be associated with the risk of low birth weight, preterm labour, stillbirth and may also negatively impact the developing baby’s brain."
Conclusion: In a large, diverse multicenter cohort with cannabis use ascertained by biological sampling, early pregnancy use was associated with adverse pregnancy outcomes that are mediated by the placenta.

Office of the Surgeon General of the United States

The U.S. Surgeon General is the Nation’s Doctor and oversees the U.S. Public Health Service (USPHS). The USPHS mission is to protect, promote, and advance the health of our nation.

Marijuana has changed over time. The marijuana available today is much stronger than previous versions. The THC concentration in commonly cultivated marijuana plants has increased three-fold between 1995 and 2014, 4% and 12% respectively (Elsohly MA, et al., 2016). Marijuana available in dispensaries in some states has average concentrations of THC between 17.7% and 23.2% (Jikomes, N., & Zoorob, M., 2018).


MotherToBaby, a service of the non-profit Organization of Teratology Information Specialists (OTIS), is a trusted source of evidence-based information on the benefit or risk of medications and other exposures during pregnancy and while breastfeeding.

How much is known about the effects of marijuana on a pregnancy? It is hard to study marijuana use during pregnancy. Marijuana contains about 400 different chemicals. Some marijuana preparations can be contaminated with other drugs, pesticides, and/or fungi.
Does using marijuana increase the chance for miscarriage? Based on the studies reviewed, it is not known if using marijuana increases the chance for miscarriage.