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Preconception and first-trimester metformin for improving pregnancy outcomes in women with polycystic ovary syndrome

Devall AJ, Cheshire J, Periyathambi N, Garg A, Vigneswaran K, Melo P, Dhillon-Smith R, Coomarasamy A

The Cochrane database of systematic reviews, 2026

Abstract

Objectives: This is a protocol for a Cochrane Review (intervention). The objectives are as follows: To evaluate the benefits and harms of metformin therapy initiated prior to conception and continued through the first trimester for women with polycystic ovary syndrome, compared with placebo or no metformin treatment, on pregnancy outcomes.

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