The review found no eligible studies for this question.
Metformin combined with clomiphene citrate probably leads to higher ovulation rate per woman compared with clomiphene citrate alone (moderate certainty).
Metformin combined with clomiphene citrate may leads to higher miscarriage rate per woman compared with clomiphene citrate alone (low certainty).
Metformin combined with clomiphene citrate showed no clear difference in live birth rate per woman compared with clomiphene citrate alone (low certainty).
Metformin combined with clomiphene citrate probably leads to higher adverse events (gastrointestinal) per woman compared with clomiphene citrate alone (moderate certainty).
Metformin combined with clomiphene citrate probably leads to higher clinical pregnancy rate per woman compared with clomiphene citrate alone (moderate certainty).