Current health guidance
FDA advises against using CBD, THC, or cannabis in any form during pregnancy or breastfeeding. THC crosses the placenta and can pass into breast milk; changing the route from smoking to eating or vaping does not establish safety.
Cannabis smoke also contains toxic combustion products. Products sold as natural, hemp-derived, or non-intoxicating can still present exposure, contamination, interaction, or labeling concerns.
What the evidence can and cannot show
Observational studies have associated prenatal cannabis exposure with outcomes including lower birth weight and preterm birth. Separating cannabis effects from tobacco, other substances, health conditions, and social factors is difficult, so estimates and causal certainty vary.
There is even less direct evidence about CBD during pregnancy and lactation. An absence of complete human data is not evidence that fetal or infant exposure is safe.
Getting help without delaying care
A pregnant or breastfeeding person using cannabis for nausea, pain, sleep, anxiety, or another concern should discuss both the symptom and the exposure with a qualified clinician. Severe vomiting, dehydration, or other urgent symptoms require prompt medical assessment.