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Evidence found and GRADE certainty

118 questions · 132 findings · 10 reviews · Gynaecology and Fertility

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No studies found 30 · 22.7%GRADE not reported 3 · 2.3%Very low 47 · 35.6%Low 41 · 31.1%Moderate 11 · 8.3%High 0 · 0%

Metformin vs megestrol

Regression of endometrial hyperplasia (with or without atypia) to proliferative, secretory, or atrophic endometrium · endometrial hyperplasia

It is very uncertain whether summary of findings table ‐ Metformin changes regression of endometrial hyperplasia (with or without atypia) to… compared with megestrol (very low certainty).

1 finding from 1 review

Metformin vs megestrol

Hysterectomy rate · endometrial hyperplasia

It is very uncertain whether summary of findings table ‐ Metformin changes hysterectomy rate compared with megestrol (very low certainty).

1 finding from 1 review

Metformin vs megestrol

Abnormal uterine bleeding · endometrial hyperplasia

It is very uncertain whether summary of findings table ‐ Metformin changes abnormal uterine bleeding compared with megestrol (very low certainty).

1 finding from 1 review

Metformin vs megestrol

Adverse effects during treatment ‐ not reported · endometrial hyperplasia

The review found no eligible studies for this question.

1 finding from 1 review

Metformin combined with clomiphene citrate vs clomiphene

Miscarriage · women with polycystic ovary syndrome

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

2 findings from 2 reviews · compare the 2 reviews

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).

2 findings from 2 reviews · 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).

2 findings from 2 reviews · 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).

2 findings from 2 reviews · compare the 2 reviews

Metformin combined with clomiphene citrate vs clomiphene

Ovulation rate · women with polycystic ovary syndrome

Metformin combined with clomiphene citrate may leads to higher ovulation rate per woman compared with clomiphene citrate alone (low certainty).

2 findings from 2 reviews · compare the 2 reviews

Summary of findings table ‐ Metformin + megestrol vs megestrol

Progression of endometrial hyperplasia to endometrial cancer · endometrial hyerplasia

It is very uncertain whether summary of findings table ‐ Metformin + megestrol changes progression of endometrial hyperplasia to endometrial cancer compared with megestrol (very low certainty).

1 finding from 1 review

Summary of findings table ‐ Metformin + megestrol vs megestrol

Regression of endometrial hyperplasia (with or without atypia) to proliferative, secretory, or atrophic endometrium · endometrial hyerplasia

Summary of findings table ‐ Metformin + megestrol may leads to higher regression of endometrial hyperplasia (with or without atypia) to… compared with megestrol (low certainty).

1 finding from 1 review