RhCG showed no clear difference in ongoing pregnancy/live birth rate per woman compared with uhCG (moderate certainty).
It is very uncertain whether hCG changes live birth rate per couple compared with LH surge (very low certainty).
hCG showed no clear difference in live birth rate per couple compared with gnRH‐a (low certainty).
u‐hCG showed no clear difference in live birth rate per couple compared with r‐hCG (low certainty).
It is very uncertain whether hCG changes live birth or ongoing pregnancy compared with placebo/no treatment (very low certainty).
It is very uncertain whether low‐dose hCG changes live birth compared with FSH throughout the COH (very low certainty).
Long protocol (GnRHa until HCG) showed no clear difference in live birth and ongoing pregnancies per woman randomised compared with long protocol (extend GnRHa 12 days after HCG) (low certainty).
It is very uncertain whether the intervention changes live birth Cleavage stage: hCG < 500 IU (very low certainty).
Modified natural cycle FET (HCG trigger) showed no clear difference in live birth rate per woman compared with HT FET (low certainty).
Modified natural cycle FET (HCG trigger) showed no clear difference in live birth rate per woman compared with HT + GnRHa suppression FET (low certainty).
GnRH agonist probably leads to lower live birth compared with HCG (moderate certainty).
The review found no eligible studies for this question.
It is very uncertain whether natural cycle FET changes live birth rate per woman compared with modified natural cycle FET (HCG trigger) (very low certainty).
Progesterone showed no clear difference in live birth or ongoing pregnancy compared with hCG regimens (low certainty).
It is very uncertain whether rhLH changes ongoing pregnancy/live birth rate per woman compared with uhCG (very low certainty).