GLP-1 and Pregnancy: Safety, Risks & Planning

GLP-1 and pregnancy are not a safe combination: GLP-1 medications like semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro, Zepbound) are NOT recommended during pregnancy, and the FDA labeling advises stopping them. If you are pregnant or find out you are pregnant while taking one, the guidance is to stop the medication and contact your clinician promptly. This is not a reason to panic, but it is a reason to call your doctor.

This article explains what the FDA labeling says, why these medications are avoided in pregnancy, and how to plan ahead if you want to conceive. It is educational information drawn from FDA labeling, not medical advice. Every situation is different, so the most important step is always to talk with your own doctor or OB.

Why GLP-1 and pregnancy do not mix

GLP-1 receptor agonists are a class of medications used for type 2 diabetes and weight management. They include semaglutide (found in Ozempic, Wegovy, and Rybelsus), tirzepatide (found in Mounjaro and Zepbound), and liraglutide (found in Victoza and Saxenda). If you want a refresher on the mechanism, see how semaglutide works for weight loss.

Across this class, the FDA labeling advises discontinuing the medication during pregnancy. There are three main reasons behind that guidance:

• Animal studies showed potential harm. In animal research, these medications showed potential harm to the developing fetus.
• There is not enough human safety data. Because these drugs have not been studied in large numbers of pregnant people, the safety picture is incomplete, and caution is the default.
• Weight loss is not recommended in pregnancy. Intentional weight loss is not advised during pregnancy because a developing baby needs adequate nutrition. GLP-1 medications work partly by reducing appetite, which runs counter to what a pregnancy needs.

Put simply, the potential risks are unknown or concerning, and the benefit of continuing during pregnancy does not outweigh them. That is why the consistent message is to stop.

What to do if you become pregnant on a GLP-1

If you become pregnant while taking a GLP-1 medication, the guidance is straightforward: stop the medication and contact your clinician promptly. Becoming pregnant while on one of these drugs is not a reason to panic. It is, however, a clear reason to call your doctor so they can guide you on next steps and prenatal care.

Do not try to manage this alone or make changes based on what you read online, including this page. Your clinician knows your history and can give you individualized advice. If you are worried about regaining weight after stopping, our guide on how to stop a GLP-1 without weight gain may help you frame that conversation, but pregnancy care always comes first.

Planning a pregnancy: timing and washout

If you are taking a GLP-1 and hope to conceive in the future, timing matters. Semaglutide has a long half-life, which means it stays in the body for weeks after the last dose. Because of this, the FDA labeling advises stopping semaglutide at least 2 months (about 8 weeks) before a planned pregnancy so it can clear the body.

This waiting period is often called a washout. Anyone planning to conceive should discuss timing and a washout period with their clinician, since the right plan depends on which medication you take, your dose, and your overall health. The table below summarizes the general planning picture.

Situation	General guidance from FDA labeling
Currently pregnant	Not recommended. Stop the medication and contact your clinician.
Planning a pregnancy (semaglutide)	Stop at least 2 months before trying to conceive so it clears the body.
Found out you are pregnant while on a GLP-1	Stop and call your doctor promptly. Not a reason to panic.
Breastfeeding	Generally not recommended; decide with your clinician.

If you are early in your GLP-1 journey and weighing pregnancy plans, it is worth raising this before you even begin. Our checklist before starting a GLP-1 and the overview of who qualifies for a GLP-1 prescription both point out that reproductive plans are part of the conversation with your prescriber.

Contraception: a special note for tirzepatide

There is one contraception detail that is specific to tirzepatide (the active ingredient in Mounjaro and Zepbound) and does not apply to semaglutide. Tirzepatide can reduce the effectiveness of oral birth control pills.

Because of this, the labeling advises using a barrier method (such as condoms) or switching to a non-oral form of contraception for 4 weeks after starting tirzepatide and for 4 weeks after each dose increase. If you rely on the pill and take tirzepatide, this is an important point to raise with your clinician so that a pregnancy is not accidental during a time when the medication is not recommended.

Again, this interaction is specific to tirzepatide, not semaglutide. But since both are widely prescribed for weight management, it is easy to mix them up, so it is worth confirming which medication you are on.

Breastfeeding and GLP-1 medications

The caution does not end at delivery. GLP-1 medications are generally not recommended while breastfeeding because there is not enough data on whether they pass into breast milk. As with pregnancy, this is a decision to make together with a clinician who can weigh your personal situation, your feeding plans, and your health goals.

Hormones and reproductive health interact with these medications in ways that are still being studied. If you want to understand more about that broader picture, see our article on GLP-1 and women's hormones.

The bottom line and your doctor

The safest approach for anyone who is pregnant, planning a pregnancy, or breastfeeding is to raise it with a doctor before starting or continuing a GLP-1. These medications can be valuable tools for weight and diabetes management outside of pregnancy, and setting realistic weight loss goals on a GLP-1 is easier when your treatment plan fits your life stage. But during pregnancy and breastfeeding, the current guidance is clear: pause, and let your clinician steer.

Nothing here replaces a conversation with your own OB or prescriber. Use this as background so you can ask better questions, then let your care team make the call that is right for you.