Can Semaglutide Increase Fertility — and Is It Safe to Stay on It If You're Trying to Conceive?

You're losing weight on Wegovy and wondering what that means for your chances of conception

This is a situation our prescribers hear about regularly. Someone starts Wegovy for weight management, begins to feel better, notices their periods becoming more regular, and starts asking whether semaglutide itself is doing something for their fertility, or whether they should stop treatment before they try for a baby. Both questions are completely reasonable, and they pull in opposite directions.

The indirect fertility story starts with biology. Excess adipose tissue can disrupt sex hormone production, raise oestrogen levels, interfere with insulin signalling, and suppress ovulation. For people with PCOS in particular, elevated insulin resistance is closely tied to anovulatory cycles. When significant weight loss occurs, that hormonal picture can shift. Periods may become more predictable. Ovulation may resume. This has been observed in the context of other weight-loss interventions, and there is observational and mechanistic evidence suggesting the same may occur with GLP-1 receptor agonists like semaglutide. Whether semaglutide has any direct effect on ovarian function beyond what weight loss would produce is not yet established, this is an area of active research rather than settled science.

The Wegovy overview covers how semaglutide works in more detail if you want the mechanism before the fertility angle.

What UK guidance says about stopping semaglutide before conception

The licensed guidance is unambiguous on one point: semaglutide should not be used if you are pregnant, breastfeeding, or planning to become pregnant. This applies to Wegovy injections and to the oral Wegovy tablet approved by the MHRA in June 2026. The reason is precautionary but serious, animal studies have shown fetal harm at clinically relevant exposures, and human safety data in pregnancy simply does not exist. No regulated prescriber would advise continuing treatment once pregnancy is confirmed or actively planned.

What the guidance also addresses is the wash-out period. The MHRA and NHS England both advise stopping GLP-1 medicines and waiting for the drug to clear your system before trying to conceive. For weekly injectable semaglutide, that means allowing meaningful time after your last dose before conception attempts begin, and if you are wondering whether you can increase your semaglutide dose early, it is worth knowing that a higher dose will also affect how long the medicine remains active in your system before any planned stopping point. Do not attempt to set that window yourself. If your cycle has become more regular on treatment and you are not using contraception, conception could happen sooner than you expect, which is why contraception is advised throughout treatment.

If you want to understand the dosing schedule you're currently on (and therefore how long the medicine remains active in your system) the guide to Wegovy doses explains each stage of the titration, including what changes between steps.

Contraception while on semaglutide: the detail most people miss

GLP-1 medicines slow gastric emptying, and that has a practical consequence for oral contraceptives: absorption may be reduced, particularly in the early weeks of treatment or after a dose increase. The NHS England guidance on weight-management injections recommends that women using oral contraceptives discuss additional contraception with their prescriber, especially when starting treatment or increasing the dose. A barrier method during those windows is a common recommendation. It is worth raising this at your next dose review, this is one of those things patients tell us they wish someone had flagged earlier.

The broader point is that unplanned pregnancy during treatment is genuinely possible if this detail is overlooked. The contraception conversation and the fertility conversation are not separate topics; they are the same conversation approached from different directions. The general FAQs cover some of the common questions around this, and the clinical team is available seven days a week for anything more specific.

Who should you talk to, and when?

If fertility is part of your thinking, the right sequence matters. Speak to your GP or a reproductive specialist alongside your prescriber, ideally before you make any changes to treatment. If you are considering fertility treatment (IVF or otherwise) your fertility clinic needs to know about every medicine you take, including Wegovy. Some clinics have their own protocols around GLP-1 use.

Timing can feel complicated here. Some people plan these conversations for a quiet period, not the week before a holiday, not in the middle of a busy patch at work, not the day after a difficult appointment. There is no wrong time to ask the question, but acting on the answer needs a plan. A same-day clinical review by a real prescriber is what you get when you come to a regulated service like ours, and if a question goes beyond our prescribers' scope (reproductive endocrinology, for example) they will say so plainly and direct you appropriately.

If you are not yet on treatment but are considering it for weight management with fertility in mind, the free consultation is the place to start that conversation. The prescriber can assess whether treatment is appropriate, what contraception planning looks like in your situation, and how to build in a sensible stopping point when the time comes. The Wegovy pricing page has the cost context, and the dosage increase guide explains how the titration typically progresses.