It is very uncertain whether hCG changes multiple pregnancy rate per pregnancy compared with gnRH‐a (very low certainty).
It is very uncertain whether hCG changes multiple pregnancy rate per pregnancy compared with LH surge (very low certainty).
u‐hCG showed no clear difference in multiple pregnancy rate per pregnancy compared with r‐hCG (low certainty).
The review found no eligible studies for this question.
It is very uncertain whether glucocorticoid supplementation changes multiple pregnancy rate per woman/couple compared with placebo (very low certainty).
The review found no eligible studies for this question.
Combined oral contraceptive pill showed no clear difference in multiple pregnancy rate (COCP + Ant vs Ant) compared with no pretreatment (low certainty).
The review found no eligible studies for this question.
IVF showed no clear difference in multiple pregnancy rate per woman randomised compared with IUI + ovarian stimulation with gonadotropins or CC (low certainty).
The review found no eligible studies for this question.
It is very uncertain whether IVF changes multiple pregnancy rate per woman randomised compared with unstimulated IUI (very low certainty).
Assisted hatching may leads to higher multiple pregnancy rate per woman randomised compared with no assisted hatching (low certainty).
It is very uncertain whether antioestrogen changes clomiphene citrate versus tamoxifen ‐ Multiple pregnancy compared with antioestrogen (very low certainty).
It is very uncertain whether the intervention changes multiple pregnancy ‐ Clomiphene citrate 5 days versus clomiphene… (very low certainty).