Is Semaglutide Safe During Pregnancy?

Step 1: Understand the regulatory position and why it exists

The Mounjaro and Wegovy prescribing information, published on the electronic Medicines Compendium, states plainly that semaglutide should not be used during pregnancy. This is not a precautionary footnote, it reflects what animal reproductive studies showed. At exposures comparable to human therapeutic doses, semaglutide caused embryo-fetal toxicity and developmental abnormalities in animal models. That kind of signal, combined with a complete absence of controlled human pregnancy data, is enough for regulators to say: do not use it.

The NHS medicines information for semaglutide reinforces this, advising women of childbearing age to use effective contraception while on treatment. The MHRA has also noted, in its broader GLP-1 communications, that these medicines are not assessed for use outside their licensed indications, and pregnancy sits firmly outside them. If you feel frustrated that the answer is so categorical when you had real reasons for starting treatment, that frustration is understandable. Weight management is a genuine health matter. But the gap in safety evidence is real, and clinicians are not in a position to fill it with reassurance that isn't there.

You can read the full regulatory context on the semaglutide pregnancy risk page, which covers what the animal data showed in more detail.

Step 2: Know what to do if you become pregnant while taking semaglutide

Accidental exposure happens. If you find out you are pregnant while already taking semaglutide, stop the medicine as soon as you know. Do not wait for your next clinical review. Contact your GP or midwife and let them know you were taking it, they will want to note this and may refer you to an obstetric team depending on how far along you are and how long you were on treatment.

The important distinction here is between deliberate ongoing use and brief accidental early-pregnancy exposure. Clinicians are not going to tell you that a few weeks of unintentional use during the first trimester means serious harm is certain, the honest answer is that nobody knows, because the data simply does not exist. What is known is that continuing use knowingly throughout pregnancy carries a theoretical risk that no responsible prescriber would take on your behalf.

The NHS medicines page for semaglutide is a useful reference point, and the Wegovy side effects in pregnancy section covers the specific symptoms and risk signals worth discussing with your care team.

Step 3: Plan the wash-out period before trying to conceive

If you are not yet pregnant but planning to conceive, the guidance is to stop semaglutide in advance and allow a wash-out period before trying. For the weekly injection form of semaglutide (Wegovy), the prescribing information recommends stopping at least two months before a planned pregnancy, to allow the medicine to clear sufficiently. If you are taking the oral semaglutide tablet (Wegovy tablets, approved by the MHRA in June 2026 as the first oral GLP-1 for weight management in the UK) discuss the appropriate interval with your prescriber, since the pharmacokinetics differ.

The NHS England guidance on weight management injections includes specific notes on contraception and pregnancy planning for anyone using these medicines. It is worth reading before any conversation with your GP. The broader question of Wegovy safety in pregnancy is also addressed in more detail on a dedicated page if you want to go deeper before that appointment.

Step 4: Talk to the right people about what comes next

Weight management does not pause because you are pregnant or planning to be. If you were making real progress on semaglutide and now need to stop, your GP or midwife can discuss what lifestyle and dietary support looks like during pregnancy. Some people find that the appetite changes they built habits around remain partially in place even after stopping. Some do not. Your prescriber is the right person to talk to about resuming treatment after birth, once breastfeeding is complete, semaglutide is not recommended while breastfeeding either, because it is not known whether it passes into breast milk and what effect that would have on a newborn.

If you would like to understand the full side-effect profile of Wegovy outside of pregnancy, or explore what the Wegovy treatment pathway looks like more broadly, those resources are available. And if you have questions about whether treatment might be right for you at a future point, our clinical team at nume reviews every consultation personally, a real prescriber, not an automated system. You can also visit the detailed page on taking semaglutide while pregnant for further clinical context. When you are ready to explore treatment options again, start your free consultation here.