Can You Use Medical Cannabis During Pregnancy?

As cannabis becomes legal in more states, questions about its safety during pregnancy have become increasingly common. Some people wonder if medical marijuana might help with morning sickness, anxiety, or chronic pain while pregnant. The answer from medical experts is clear and consistent: cannabis use during pregnancy is not recommended, whether it’s medical or recreational.

This isn’t about judgment. It’s about understanding the real risks that research has uncovered and making informed decisions with accurate information.

What Happens When You Use Cannabis While Pregnant?

When someone uses cannabis during pregnancy, the main active ingredient known as THC (tetrahydrocannabinol) doesn’t stay in the mother’s system alone. It crosses through the placenta and reaches the developing baby.

The placenta acts as a lifeline between mother and child, transferring oxygen and nutrients. Unfortunately, it also transfers substances like THC. Once THC enters the baby’s system, it can affect organs that are still forming, particularly the brain, which undergoes critical development throughout pregnancy.

This transfer happens regardless of how cannabis is used. Smoking, vaping, eating edibles, or using oils all deliver THC that can reach the baby.

Is Medical Cannabis Different From Recreational Cannabis During Pregnancy?

Here’s something that surprises many people: from a safety standpoint during pregnancy, there’s no meaningful difference between medical and recreational cannabis. Both contain THC and other cannabinoids that cross the placenta.

Even when someone has a medical marijuana card and uses cannabis to manage legitimate health concerns like nausea, chronic pain, or anxiety, the risks to a developing baby remain the same. The “medical” label doesn’t make the substance safer during pregnancy.

Major medical organizations including the American College of Obstetricians and Gynecologists (ACOG) and the Centers for Disease Control and Prevention (CDC) have reviewed the available research. Their conclusion: there are no proven, evidence-based reasons to recommend medical cannabis during pregnancy. The potential benefits simply don’t outweigh the documented risks.

Healthcare providers are advised not to prescribe or recommend cannabis to pregnant patients, even for medical purposes.

What About CBD Products During Pregnancy?

Cannabidiol (CBD) has gained popularity as a supposedly gentler alternative to THC-containing products. You’ll find CBD in oils, gummies, lotions, and countless other forms, often marketed as natural remedies for anxiety, pain, or sleep problems.

But here’s what the research shows: CBD’s safety during pregnancy hasn’t been established. We don’t have enough quality studies to know whether CBD products are safe for developing babies. Without that evidence, medical experts advise avoiding CBD during pregnancy, just as they do with THC.

There’s another concern with CBD products. Since the CBD market isn’t tightly regulated, products may contain varying amounts of CBD, THC, or other substances not listed on the label. A product labeled “CBD only” might actually contain THC, creating unintended exposure.

How Common Is Cannabis Use During Pregnancy?

Cannabis use during pregnancy has become more common over the past two decades. Between 2002 and 2017, reported rates of prenatal cannabis use doubled in the United States.

Current estimates suggest that somewhere between 5% and 7% of pregnant people report using cannabis. In certain states, particularly those where cannabis is legal, the rates are higher. Some people turn to cannabis specifically hoping to relieve pregnancy symptoms like morning sickness or anxiety.

Despite increasing legalization and changing cultural attitudes toward cannabis, the medical consensus hasn’t changed. Legal access doesn’t equal safety during pregnancy.

What Are the Risks of Using Cannabis During Pregnancy?

Research has identified several serious concerns about cannabis use during pregnancy. Understanding these risks helps explain why medical guidance is so clear.

Problems With Pregnancy and Birth

Cannabis use during pregnancy has been linked to several complications:

• Preterm birth – Babies born before 37 weeks face higher risks of breathing problems, feeding difficulties, and developmental delays
• Low birth weight – Babies who weigh less than expected at birth may have trouble maintaining body temperature, fighting infections, and feeding properly
• Stillbirth – Some research suggests an association between cannabis use and increased stillbirth risk
• NICU admission – Babies exposed to cannabis in the womb more often require intensive care after birth

Pregnancy-related complications also become more likely. Studies have found associations between prenatal cannabis use and conditions like gestational hypertension (high blood pressure during pregnancy) and preeclampsia, a potentially dangerous condition involving high blood pressure and organ damage. Abnormal placental function, including placental abruption where the placenta separates from the uterine wall prematurely, has also been reported more often in cannabis users.

Effects on Brain Development and Long-Term Outcomes

The developing brain is particularly vulnerable to cannabis exposure. THC interferes with the endocannabinoid system, which plays a crucial role in how the brain forms during pregnancy.

Children exposed to cannabis before birth show higher rates of difficulties with:

• Attention and focus – Staying on task becomes harder, which affects learning in school
• Memory – Both short-term and long-term memory can be impacted
• Learning abilities – Processing and retaining new information may be more challenging
• Behavior regulation – Controlling impulses and managing emotions can present ongoing struggles
• Academic achievement – Overall school performance tends to be lower

These aren’t minor, temporary effects. Research shows these challenges can persist as children grow, affecting their educational success and quality of life years after birth.

What Do Major Medical Organizations Recommend?

The guidance on cannabis during pregnancy is remarkably consistent across trusted medical and public health organizations. This unified stance reflects the strength of the evidence about potential harm.

Organizations advising against cannabis use during pregnancy include:

• Centers for Disease Control and Prevention (CDC)
• American College of Obstetricians and Gynecologists (ACOG)
• American Academy of Pediatrics
• National Institutes of Health (NIH)
• World Health Organization (WHO)
• Substance Abuse and Mental Health Services Administration (SAMHSA)

These organizations don’t just recommend avoiding cannabis during pregnancy. They also advise against use while trying to become pregnant and while breastfeeding, since THC passes into breast milk and reaches nursing babies.

Medical providers are now encouraged to screen for cannabis use during routine prenatal care. This screening should happen before pregnancy (when planning), throughout pregnancy, and after delivery. The goal isn’t punishment or shame but rather opening honest conversations about risks and offering support for people who want to stop using cannabis.

Why Do Some People Use Cannabis During Pregnancy?

Understanding why people turn to cannabis during pregnancy matters. Nobody uses substances while pregnant without a reason.

Morning sickness stands out as a major factor. Nausea and vomiting during pregnancy can be absolutely miserable, sometimes severe enough to interfere with nutrition and daily life. When people hear that cannabis might help with nausea, and when traditional remedies aren’t working, trying marijuana can seem reasonable.

Chronic pain presents another challenge. Some people enter pregnancy already using medical cannabis for pain conditions, and stopping raises concerns about how they’ll manage their pain for nine months.

Anxiety and mental health struggles don’t disappear during pregnancy. In fact, pregnancy can intensify anxiety, and many psychiatric medications have their own risks. Cannabis might seem like a “natural” alternative.

The problem is that while these reasons are understandable, they don’t change the evidence about fetal risk. Fortunately, there are safer alternatives for managing pregnancy symptoms.

What Are Safer Alternatives for Common Pregnancy Symptoms?

If you’re dealing with difficult pregnancy symptoms, you’re not out of options. Evidence-based treatments exist that don’t carry the same risks as cannabis.

For Morning Sickness and Nausea

Several approaches help with pregnancy-related nausea:

• Vitamin B6 supplements – Often the first recommendation, these can significantly reduce nausea
• Doxylamine – An over-the-counter antihistamine that’s safe and effective for pregnancy nausea
• Small, frequent meals – Eating smaller amounts more often helps keep nausea manageable
• Ginger – Whether as tea, candies, or supplements, ginger has genuine anti-nausea properties
• Prescription medications – For severe morning sickness (hyperemesis gravidarum), medications like ondansetron can be prescribed

Your healthcare provider can guide you toward the right combination for your situation.

For Pain Management

Pain during pregnancy requires careful management, but options exist:

• Physical therapy – Specially trained prenatal physical therapists can address musculoskeletal pain
• Acetaminophen – Considered safe during pregnancy when used as directed
• Prenatal massage – Can relieve muscle tension and pain
• Water therapy – Swimming or water exercises reduce pressure on joints
• Positioning and support – Pregnancy pillows and proper body mechanics help

For chronic pain conditions, working with both your obstetrician and pain specialist helps develop a safe management plan.

For Anxiety and Mental Health

Mental health support during pregnancy is essential:

• Therapy – Cognitive behavioral therapy and other counseling approaches work well during pregnancy
• Support groups – Connecting with others facing similar challenges reduces isolation
• Stress reduction techniques – Mindfulness, prenatal yoga, and meditation all help manage anxiety
• Selective medications – Some psychiatric medications are considered safe during pregnancy when benefits outweigh risks

Never stop taking prescribed psychiatric medication without medical guidance. Your provider can help weigh risks and benefits.

How to Talk With Your Healthcare Provider About Cannabis Use

Honest communication with your healthcare team is crucial, even when the conversation feels uncomfortable. Your provider needs complete information to give you the best care.

If you’re using cannabis or have questions about it, bring it up directly. You might say something like, “I’ve been using cannabis for nausea” or “I used marijuana before I knew I was pregnant, and I’m worried about effects on my baby.”

Medical providers are trained to have these conversations without judgment. Their concern is your health and your baby’s wellbeing, not punishment or reporting. In most situations, telling your doctor about cannabis use won’t result in legal consequences or child protective services involvement, though laws vary by state.

If you’re having trouble stopping cannabis use on your own, say so. Substance use programs specifically designed for pregnant people can provide support. These programs understand the unique challenges of pregnancy and offer non-judgmental help.

Questions to ask your provider include:

• What are the specific risks of cannabis use at my stage of pregnancy?
• If I used cannabis before I knew I was pregnant, what should I do now?
• What are safer alternatives for the symptoms I’m experiencing?
• Where can I get support if I’m having difficulty stopping?
• Will my baby need any special monitoring or testing after birth?

What If You Used Cannabis Before Knowing You Were Pregnant?

Many people use cannabis before realizing they’re pregnant. If this happened to you, try not to panic.

The best thing you can do is stop using cannabis as soon as you learn you’re pregnant. While we know that ongoing exposure increases risks, stopping use eliminates further exposure and potential harm.

Tell your healthcare provider what happened. They can monitor your pregnancy more closely if needed and watch for any complications. Most importantly, they can reassure you and answer your specific questions about your situation.

Remember that stress itself isn’t good for pregnancy. Once you’ve stopped using cannabis and informed your medical team, focus on the healthy choices you’re making going forward.

The Bottom Line on Cannabis Use During Pregnancy

The research on cannabis and pregnancy points in one clear direction: don’t use it. This guidance applies to medical marijuana, recreational marijuana, CBD products, and every form of cannabis.

No amount has been proven safe. No stage of pregnancy makes cannabis use acceptable. No method of consumption eliminates the risks.

The developing brain is particularly vulnerable to THC, and the potential consequences which range from pregnancy complications to long-term developmental effects are too significant to ignore.

If you’re pregnant and using cannabis, or thinking about becoming pregnant, talk with your healthcare provider. They can help you stop safely and find better alternatives for whatever symptoms or conditions you’re managing. The conversation might feel difficult, but it’s one of the most important steps you can take for your baby’s health.