Can You Fall Pregnant on Wegovy? What to Know Before, During and After

Does Wegovy stop you getting pregnant?

No. Wegovy does not act as contraception, and conceiving while on it is entirely possible. This is a question our prescribers hear most weeks, and the answer surprises many people, partly because weight loss itself can restore or improve fertility. Conditions such as polycystic ovary syndrome (PCOS) are closely linked to body weight, and as weight falls, ovulation can become more regular and predictable than it was before. That is genuinely good news for long-term reproductive health, but it does mean the window during which an unplanned pregnancy could occur is real and worth planning around. The Wegovy treatment page sets out how semaglutide works for weight management more broadly.

If you are sexually active and not planning a pregnancy, reliable contraception throughout treatment is important. For most people, a combined oral contraceptive or progestogen-only pill remains appropriate. Unlike tirzepatide, there is currently no evidence that semaglutide reduces the absorption of oral contraceptive pills, so the usual pill rules apply. That said, your prescriber is the right person to confirm which method suits your individual circumstances if you are wondering whether you can get pregnant on Wegovy.

What are the risks of becoming pregnant while taking Wegovy?

Animal studies conducted during Wegovy's clinical development raised concerns about adverse effects on fetal development at exposures above the therapeutic human dose. Human data are limited, clinical trials excluded pregnant participants, so we do not have large controlled safety studies in people. This absence of evidence is not the same as evidence of safety, and regulators including the MHRA have therefore classified semaglutide as not recommended during pregnancy rather than proven safe. You can read the prescribing details in the Wegovy Summary of Product Characteristics on the eMC.

If pregnancy is confirmed while you are on Wegovy, the medicine should be stopped. There is no established evidence that a single dose taken unknowingly before pregnancy was detected causes harm, but continuing treatment is not appropriate. For a fuller picture of what being pregnant on Wegovy means for your care and next steps, contact your GP or obstetric team promptly so that your pregnancy can be monitored as normal and any concerns can be assessed early. Our support team can help you reach your prescriber quickly if you have an urgent clinical question outside of a GP appointment.

How long before trying to conceive should you stop Wegovy?

Current guidance, reflected on the NHS England weight-management injections page, recommends stopping semaglutide at least two months before attempting to conceive. This wash-out period allows the medicine to clear your system before early fetal development begins. Semaglutide has a half-life of roughly one week, so it takes several weeks for plasma levels to fall significantly after the last dose.

Two months is a minimum guide, not a guarantee, and your own situation matters. If you have been on a higher maintenance dose or have other health conditions relevant to pregnancy, your GP or specialist may advise a longer gap. It is also worth discussing what happens to your weight management during that period: stopping treatment without a plan can lead to weight regain, which has its own implications for conception and pregnancy health. The page on falling pregnant on Wegovy goes into more depth on how to structure that transition.

What if you discovered you were pregnant and had already taken Wegovy?

Try not to panic. Taking a dose or two before a positive pregnancy test is not an established cause of harm, and many people in this position go on to have uncomplicated pregnancies. What matters now is acting promptly: stop taking Wegovy, make an appointment with your GP to let them know, and ensure your antenatal care starts as planned. You can also report the exposure through the MHRA's Yellow Card scheme, which helps build the safety evidence base for medicines used inadvertently in pregnancy. The scheme is straightforward and your midwife or GP can help you complete it.

Further questions about Wegovy use in pregnancy are answered in detail on the Wegovy and pregnancy page, including what antenatal monitoring is usually recommended. If you want to understand what alternatives exist for weight management once a pregnancy is confirmed, speaking to a clinician is the right first step, some lifestyle support programmes remain appropriate throughout pregnancy, even when medicines are paused. You can also find out more about whether Wegovy is used for type 2 diabetes on our dedicated page, and explore what a clinical assessment with our prescribers covers on the weight-loss treatments page.