Semaglutide is prescribed off-label for polycystic ovary syndrome, and the trial evidence behind that is real but much smaller than the prescribing.
This page is what those trials measured. It also names what they did not.
The dosing used in them is the standard weight ladder, set out in semaglutide dosage.
It is not a labeled use
The Wegovy label, revised June 2026, never uses the word polycystic [5]. The Ozempic label uses it once, and that is polycystic kidney disease in a trial exclusion list [6].
So every prescription for PCOS is off-label. That is legal and common, and it means the evidence sits in investigator-led trials rather than in a registration program.
What the pooled trials found
A 2024 meta-analysis gathered every randomized trial of a GLP-1 drug against placebo in women with PCOS and obesity [1]. It found four trials with 176 participants.
Read that denominator carefully. Semaglutide was used in 23 of those women, 13% of the total, and liraglutide in 103, or 58%.
| Outcome | Mean difference vs placebo | P value |
|---|---|---|
| Waist circumference | −2.42 cm (95% CI −3.10 to −1.74) | < 0.00001 |
| Triglycerides | −0.20 (95% CI −0.30 to −0.11) | < 0.00001 |
| Total testosterone | −1.33 (95% CI −2.55 to −0.12) | 0.03 |
| Total cholesterol | −0.04 (95% CI −0.10 to 0.01) | 0.15 |
| HOMA-IR | −0.30 (95% CI −0.92 to 0.32) | 0.35 |
Waist circumference, triglycerides and testosterone moved. Cholesterol and insulin resistance did not.
That last row is worth pausing on. Insulin resistance is central to how PCOS is explained, and the pooled trials did not shift it.
Adverse event data covered 112 of the women, of whom 49 had mild effects such as nausea and abdominal pain. The wider label picture is in semaglutide side effects.
Semaglutide added to metformin
The largest single trial randomized 100 overweight or obese women with PCOS to metformin alone or metformin plus semaglutide 1 mg weekly, for 16 weeks [2].
Eighty of them completed it. The combination group lost 6.09 kg on average, against 2.25 kg on metformin alone.
Waist-to-hip ratio, testosterone and C-reactive protein all improved more in the combination group, each at P < 0.01. More women in that group had their menstrual cycles return.
Everyone then took metformin alone from week 16 to week 40. Natural pregnancy occurred in 35% of the combination group against 15% of the metformin group.
That is one open-label trial at a single center, and pregnancy was a secondary outcome. It is a reason to run a bigger trial, not a settled result.
What happens after it stops
One study followed 25 women with PCOS and obesity for two years after a 16-week course of semaglutide 1.0 mg added to metformin [3].
Median weight fell from 101 kg to 92 kg on treatment. Two years later it was 95 kg, and 21 of the 25 were still below their starting weight.
Free testosterone fell from 6.16 to 4.12 nmol/L during treatment (P = 0.012) and did not significantly deteriorate afterwards. The cholesterol and glucose improvements did revert toward baseline.
Everyone in that study stayed on metformin throughout, so it does not describe stopping outright. The general pattern is in what happens when you stop taking semaglutide.
What no trial has settled
A 2026 evidence map of incretin drugs in PCOS was published by the group behind several of these trials[4]. The gaps it describes match what the numbers above show.
No trial has run long enough to measure live births. None has compared semaglutide head to head with metformin as a first-line choice.
None has measured hirsutism or acne as a primary outcome, and none has followed women past two years.
An earlier study from the same group found semaglutide delaying gastric emptying in women with PCOS and obesity [7]. That is part of how the drug works, not a PCOS-specific effect.
Putting it together
Semaglutide reduces weight and waist size in women with PCOS, and lowers testosterone alongside that. Those are consistent findings across small trials.
What is not established is whether it does anything for PCOS that weight loss alone would not, or what happens to fertility over time.
To compare prescribers by what a month costs, see the compounded semaglutide rankings, and for the rest of this goal, the weight hub.