It is very uncertain whether IVF changes miscarriage rate per woman randomised compared with unstimulated IUI (very low certainty).
It is very uncertain whether IVF changes miscarriage rate per woman randomised compared with IUI + ovarian stimulation with gonadotropins or CC (very low certainty).
The review found no eligible studies for this question.
Day 3 showed no clear difference in miscarriage rate per woman compared with day 2 embryo transfer following IVF or ICSI (moderate certainty).
It is very uncertain whether glucocorticoid supplementation changes miscarriage rate per woman compared with placebo (very low certainty).
RhCG showed no clear difference in miscarriage rate per woman compared with uhCG (low certainty).
It is very uncertain whether rhLH changes miscarriage rate per woman compared with uhCG (very low certainty).
Brief co‐incubation showed no clear difference in miscarriage rate per randomized woman compared with standard insemination (low certainty).
Metformin showed no clear difference in miscarriage rate per woman compared with placebo or no treatment (low certainty).
Low‐dose aspirin showed no clear difference in miscarriage rate per woman compared with placebo or no treatment (low certainty).
It is very uncertain whether assisted hatching changes miscarriage rate per woman randomised compared with no assisted hatching (very low certainty).