Fresh showed no clear difference in ongoing pregnancy rate: cumulatively compared with frozen embryo transfer (cumulatively) (moderate certainty).
It is very uncertain whether fresh changes miscarriage rate: cumulatively compared with frozen embryo transfer (cumulatively) (very low certainty).
It is very uncertain whether fresh changes multiple pregnancy rate: cumulatively compared with frozen embryo transfer (cumulatively) (very low certainty).
The review found no eligible studies for this question.
Fresh showed no clear difference in hypertensive disorders of pregnancy: cumulatively compared with frozen embryo transfers (low certainty).
Fresh may leads to higher hypertensive disorders of pregnancy: after first ET compared with frozen embryo transfers (low certainty).
Fresh showed no clear difference in large for gestational age (birth weight above 90th percentile):… compared with frozen embryo transfers (low certainty).
Oxytocin antagonists showed no clear difference in live birth compared with control (low certainty).
It is very uncertain whether oxytocin antagonists changes miscarriage compared with control (very low certainty).
Oxytocin antagonists may leads to higher clinical pregnancy compared with control (low certainty).
It is very uncertain whether oxytocin antagonists changes complications compared with control (very low certainty).
Non‐pharmacological intervention showed no clear difference in live birth compared with no intervention or placebo (low certainty).
It is very uncertain whether non‐pharmacological intervention changes clinical pregnancy compared with non‐pharmacological intervention (very low certainty).
The review found no eligible studies for this question.
It is very uncertain whether pharmacological intervention changes adverse events ‐ Metformin plus liraglutide vs metformin Nausea… compared with pharmacological intervention (very low certainty).
It is very uncertain whether pharmacological intervention changes clinical pregnancyMetformin plus liraglutide vs metformin Met + CC +… compared with pharmacological intervention (very low certainty).
It is very uncertain whether pharmacological intervention changes miscarriageMet + CC + L‐carnitine vs Met + CC + placebo compared with pharmacological intervention (very low certainty).