From the Research
Marijuana use during pregnancy is harmful and should be avoided. The most recent and highest quality study, published in 2025, found that prenatal cannabis exposure is associated with increased risks of autism spectrum disorder, attention-deficit/hyperactivity disorder, psychosis proneness, and other neurodevelopmental problems in children 1. THC, the main psychoactive compound in marijuana, can cross the placenta and reach the developing fetus, potentially affecting brain development and growth.
Key Findings
- Studies have linked prenatal marijuana exposure to lower birth weight, premature birth, and developmental issues in children, including problems with attention, memory, and problem-solving skills 2, 3.
- Even medical marijuana should not be used during pregnancy, as there are no approved medical indications for cannabis use in pregnant women.
- The risks apply to all forms of marijuana consumption, including smoking, vaping, edibles, and oils.
- Despite changing legal status in many regions, medical experts consistently advise against marijuana use during pregnancy and while breastfeeding, as THC can also pass into breast milk and affect the nursing infant.
Recommendations
- If you're using marijuana for medical reasons and are pregnant or planning pregnancy, consult your healthcare provider about safer alternative treatments.
- Pregnant individuals should prioritize making conscious decisions to responsibly manage their cannabis use during pregnancy to minimize potential harm to the fetus, and consider harm reduction approaches to mitigate harm to their unborn children 4.
- Healthcare providers should provide education on harm reduction practices and safer alternative treatments for pregnant individuals who use cannabis.