Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

395 questions · 407 findings · 33 reviews · Headline outcomes only

No studies found 113 · 27.8%GRADE not reported 39 · 9.6%Very low 91 · 22.4%Low 105 · 25.8%Moderate 50 · 12.3%High 9 · 2.2%

Metformin combined with clomiphene citrate vs clomiphene

Live birth rate per woman · women with polycystic ovary syndrome

Metformin combined with clomiphene citrate showed no clear difference in live birth rate per woman compared with clomiphene citrate alone (low certainty).

1 finding from 1 review · compare the 2 reviews

Metformin combined with clomiphene citrate vs clomiphene

Gastrointestinal adverse events · women with polycystic ovary syndrome

Metformin combined with clomiphene citrate probably leads to higher adverse events (gastrointestinal) per woman compared with clomiphene citrate alone (moderate certainty).

1 finding from 1 review · compare the 2 reviews

Metformin combined with clomiphene citrate vs clomiphene

Clinical pregnancy rate · women with polycystic ovary syndrome

Metformin combined with clomiphene citrate probably leads to higher clinical pregnancy rate per woman compared with clomiphene citrate alone (moderate certainty).

1 finding from 1 review · compare the 2 reviews