Gonadotrophins probably leads to higher clinical pregnancy rate per woman compared with continued clomiphene citrate (moderate certainty).
Recombinant follicle stimulating hormone showed no clear difference in clinical pregnancy rate per woman compared with urinary‐derived gonadotrophins (low certainty).
It is very uncertain whether human menopausal gonadotrophin or highly purified human menopausal… changes clinical pregnancy rate per woman compared with urinary follicle stimulating hormone (very low certainty).
Metformin probably leads to higher clinical pregnancy rate per woman compared with placebo or no treatment (moderate certainty).
Metformin combined with clomiphene citrate probably leads to higher clinical pregnancy rate per woman compared with clomiphene citrate alone (moderate certainty).
Metformin may leads to higher clinical pregnancy rate (per woman) compared with placebo co‐treatment (low certainty).
Metformin may leads to lower clinical pregnancy rate per woman aParticipants with BMI ≥ 30 kg/m2 compared with clomiphene citrate (low certainty).
Metformin may leads to higher clinical pregnancy rate per womanaParticipants with BMI < 30 kg/m2… compared with clomiphene citrate (low certainty).