Summary: In overweight or obese women with PCOS, adding weekly semaglutide to metformin for 16 weeks produced greater weight loss, lower testosterone, better menstrual recovery, and a higher subsequent natural pregnancy rate than metformin alone.
PICO Summary
| Element | Detail |
|---|---|
| Population | 100 overweight or obese women with PCOS (Rotterdam criteria); 80 completed. China. |
| Intervention | Metformin 1000 mg twice daily plus semaglutide 1 mg weekly for 16 weeks, then metformin alone to week 40. |
| Comparison | Metformin 1000 mg twice daily alone. |
| Outcome | Combination lost 6.09±3.34 kg vs 2.25±4.27 kg, with greater falls in BMI, waist-to-hip ratio, testosterone, visceral adiposity index, and CRP (all p<0.01). Better menstrual recovery and a higher natural pregnancy rate by week 40 (35% vs 15%; p<0.05). |
Semaglutide plus metformin in PCOS
RCT · overweight/obese PCOS · 16 weeks
Adding weekly semaglutide to metformin nearly tripled weight loss and doubled the natural pregnancy rate versus metformin alone, with greater falls in testosterone and inflammation. Conceptions, not live births, were reported.
Expert Commentary
This is a clinically resonant result, because in PCOS weight loss is mechanism, not cosmetics, and a doubling of the natural pregnancy rate is exactly the kind of outcome that matters more than a change in a metabolic surrogate. The combination’s roughly 6% weight loss crossed the threshold where ovulation tends to return, and the parallel improvements in testosterone, visceral adiposity, and inflammation give a coherent picture. I read it positively, with caveats. It is a single-centre, open-label study of 100 women over a short horizon, and crucially it reports conceptions, not live births, so miscarriage and live-birth rates remain unknown. The design is also sensible in a way worth highlighting: semaglutide was used for preconception weight optimisation then stopped, with metformin carrying the conception phase. Can I use this with my patients? Cautiously and selectively. For an overweight woman with PCOS seeking pregnancy who has not responded to lifestyle and metformin, it supports time-limited GLP-1-assisted weight loss before conception, with firm counselling on effective contraception during treatment and stopping the drug well before attempting to conceive. I would await live-birth data before stronger claims.
References
Chen H, Lei X, Yang Z, et al. Effects of combined metformin and semaglutide therapy on body weight, metabolic parameters, and reproductive outcomes in overweight/obese women with polycystic ovary syndrome: a prospective, randomized, controlled, open-label clinical trial. Reprod Biol Endocrinol. 2025;23(1):108. doi:10.1186/s12958-025-01447-3