What are the risks of cannabis use during pregnancy and breastfeeding?
Research-Based Answer
Cannabis use during pregnancy is associated with significant fetal risks, and no safe level of use has been established. THC crosses the placenta and blood-brain barrier, and is detectable in fetal tissue. Fetal outcomes associated with prenatal cannabis exposure: low birth weight (OR 1.77), preterm birth (OR 1.36), small for gestational age, NICU admission, and stillbirth. Neurodevelopmental effects: longitudinal studies (ABCD study, Ottawa Prenatal Prospective Study) show associations with ADHD symptoms, anxiety, impaired executive function, and altered brain connectivity in exposed children — effects detectable at ages 9–12. Breastfeeding: THC concentrates in breast milk at 8x plasma levels and is detectable for weeks after use. Infant exposure via breastfeeding is associated with decreased motor development at 1 year. The American College of Obstetricians and Gynecologists, AAP, and CDC all advise complete abstinence during pregnancy and breastfeeding. The common use of cannabis for pregnancy nausea is particularly concerning given these risks.
This answer summarizes peer-reviewed research and is intended for educational purposes only. It does not constitute medical advice. Consult a qualified healthcare provider before making any medical decisions.