Nervana Medical | Patient Education
Questions about cannabis use during pregnancy and breastfeeding are becoming increasingly common. Some patients use cannabis for nausea or chronic pain and find it helpful for conditions such as insomnia and wonder whether it’s safe to continue during pregnancy or while nursing.
The honest answer is that current medical guidance recommends avoiding cannabis during pregnancy and breastfeeding because of potential risks and limited long-term safety data.
This article explains why.
Cannabis Use During Pregnancy: What the Research Suggests
Research on cannabis in pregnancy is still evolving, but several concerns have been identified.
Studies have found associations between prenatal cannabis use and:
- Increased risk of preterm birth
- Higher likelihood of low birth weight or small-for-gestational-age infants
- Possible increased need for NICU care
While not every pregnancy exposed to cannabis has complications, these patterns have led major medical organizations to advise caution.
Why Cannabis May Affect the Developing Baby
THC, the psychoactive component of cannabis:
- Crosses the placenta easily
- Is highly fat-soluble and accumulates in brain and body tissues
- Can remain in the body for extended periods depending on frequency of use
There is concern that exposure may interfere with the baby’s developing endocannabinoid system, which plays a role in brain development and emotional regulation.
Some research has linked prenatal exposure with:
- Changes in infant behavior and arousal
- Possible effects on executive function later in childhood
These findings are still being studied, but they support a cautious approach.
Cannabis and Breastfeeding
Cannabis use during breastfeeding is also discouraged.
Research shows:
- THC can concentrate in breast milk at higher levels than in maternal blood
- It may remain detectable for several days
- “Pumping and dumping” does not reliably eliminate exposure
Because the infant brain continues rapid development after birth, exposure through breast milk raises concerns about long-term neurodevelopment.
What Major Medical Organizations Recommend
Professional groups including:
- The American College of Obstetricians and Gynecologists
- The American Academy of Pediatrics
- The Academy of Breastfeeding Medicine
generally advise avoiding cannabis use during pregnancy and lactation due to uncertain safety and potential developmental effects.
Important Clarification: “Medical” Doesn’t Always Mean Safe in Pregnancy
Even when cannabis is used for medical reasons:
- Safety data in pregnancy are limited
- Many studies focus on potential risks rather than benefits
- Alternative treatments often have more established safety profiles
For pregnancy-related symptoms such as nausea, discussing safer options with a healthcare provider is recommended. At Nervana medical, we offer IV therapy for Hyperemesis Gravidarum as well to help combat severe nausea and vomiting in pregnancy.
If You Are Pregnant or Breastfeeding and Using Cannabis
You’re not alone, and this is a judgment-free conversation.
Consider:
- Talking openly with your provider
- Reviewing safer alternatives
- Gradual reduction strategies if needed
- Support for symptom management
The goal is informed decision-making, not shame.
The Bottom Line
Current medical guidance recommends avoiding cannabis during pregnancy and breastfeeding because:
- THC crosses the placenta and enters breast milk
- Some studies suggest increased pregnancy and newborn risks
- Long-term developmental effects remain uncertain
If you have questions about cannabis, pregnancy, or breastfeeding, the team at Nervana Medical is here to help you navigate evidence-based options safely.