Can You Get Pregnant on Wegovy — and Is It Safe to Try?

The biggest misconception: Wegovy prevents pregnancy

A question our prescribers hear most weeks goes something like this: "I thought I was safe because I was on Wegovy, can I still get pregnant?" The short answer is yes. Wegovy does not act as contraception. There is no contraceptive mechanism in semaglutide, and UK guidance from NHS England's weight-management-injections resource is clear that reliable contraception should be used throughout treatment.

The misconception is understandable. Significant weight loss can alter hormone levels and menstrual patterns in ways that can make ovulation feel unpredictable. But the same physiological changes that disrupt cycles early in treatment can restore regular ovulation as weight falls, particularly in women with conditions such as polycystic ovary syndrome. So the practical reality is almost the opposite of the myth: treatment may improve fertility over time, which makes contraception more important, not less.

If you are using oral contraceptives alongside Wegovy specifically, there is a further consideration. Because tirzepatide (Mounjaro) slows gastric emptying and may reduce pill absorption, NHS guidance recommends adding a non-oral method for the first four weeks of treatment and after each dose increase. The evidence for semaglutide on pill absorption is less clear-cut, but discussing your contraception choice with a prescriber or GP remains wise. Patches, implants and hormonal coils are unaffected by gut-motility changes.

What we know about semaglutide in pregnancy, and the gaps that remain

Animal studies with semaglutide showed adverse effects on foetal development at doses relevant to the therapeutic range, which is a primary reason the medicine is not recommended in pregnancy. Human data is limited, clinical trials excluded pregnant participants, so the evidence base is not comparable to medicines with decades of pregnancy-safety research behind them.

What that means in practice: we do not have strong evidence that Wegovy causes harm in human pregnancies, but we equally do not have the safety data to say it is acceptable to continue. Regulators and clinicians take the precautionary position, and that position is reflected in the Wegovy SmPC and in NHS England guidance. The NHS medicines page for semaglutide states explicitly that it should not be used in pregnancy. If you want to explore this topic in detail, our page on Wegovy and pregnancy goes further into what the current evidence base covers.

There is also the question of timing. Semaglutide has a half-life of approximately one week, and UK guidance generally advises stopping at least two months before attempting to conceive. This window allows the medicine to clear sufficiently and gives you and your clinical team time to review your weight-management plan going forward. Some women find it helpful to discuss this with a GP or specialist rather than making the decision alone, particularly if stopping treatment raises concerns about weight regain.

If you find out you are pregnant while still taking Wegovy

Stop the medicine. That is the first practical step. Then contact your GP or midwife as soon as possible, so they are aware of the exposure and can arrange appropriate monitoring as your pregnancy progresses. You do not need to wait for a scheduled appointment or your next prescription review before acting.

Accidental exposure in early pregnancy is not uncommon, unplanned pregnancies happen, and women on Wegovy are not always expecting their fertility to change as quickly as it sometimes does. Telling your GP promptly means any decision-making about monitoring can happen in a proper clinical conversation, with the full picture in front of someone qualified to advise you. For a fuller discussion of what to do in this scenario, this page covers the steps to take if you get pregnant on Wegovy.

If you had been hoping that Wegovy might actively help with getting pregnant (for example, if weight has been a barrier to fertility treatment) that is a different and legitimate conversation. Whether Wegovy can support fertility is a separate question, and there is emerging evidence worth reading carefully before drawing conclusions. The short version: weight loss achieved through treatment can improve reproductive outcomes in some women, but semaglutide itself is not a fertility medicine and must be stopped before conception.

Planning ahead: treatment, pause and what comes next

If you are currently on Wegovy and thinking about pregnancy in the next year or so, the conversation to have now is with your GP or prescriber, not after you have stopped contraception. They can help you think through the timing of stopping treatment, how to protect weight progress during a pause, and whether there are alternative strategies for the period covering conception and pregnancy itself.

Lifestyle-based weight management (including diet and activity changes that are safe in pregnancy) becomes the primary tool during this time. Some women find that the habits built during treatment hold reasonably well; others need active support. Neither outcome is a failure, and planning for either one makes the transition smoother.

At nume, every repeat prescription goes through a clinical review before it is issued, and contraception and family planning are part of the picture a prescriber considers. If your circumstances have changed (including your intentions around pregnancy) that is worth raising at your next review, and if you have specific questions about safety during this period, our page on whether you can take Wegovy if pregnant covers the clinical guidance in full. Start a free consultation if you would like to discuss where you are and what the right plan looks like for you. You can also read about other lifestyle factors that interact with Wegovy while you are planning your treatment approach, and find out more about how the nume clinical team works.