It is very uncertain whether low‐dose hCG changes live birth compared with FSH throughout the COH (very low certainty).
Low‐dose aspirin showed no clear difference in live birth compared with placebo or no treatment (moderate certainty).
Embryo culture with low oxygen concentration probably leads to higher live birth rate compared with embryo culture with atmospheric oxygen concentration (moderate certainty).
High probably leads to higher live birth rate ‐ high vs low or no hyaluronic acid compared with low or no hyaluronic acid (moderate certainty).
The review found no eligible studies for this question.
Single may leads to lower live birth compared with multiple embryo transfer (low certainty).
The review found no eligible studies for this question.
It is very uncertain whether any anti‐adhesion therapy changes live birth a compared with placebo or no treatment following operative hysteroscopy (very low certainty).
Any anti‐adhesion therapy A showed no clear difference in live birth a compared with anti‐adhesion therapy B following operative hysteroscopy (low certainty).
Long‐acting FSH (all doses) probably leads to lower live birth rate ‐ Low dose (60 to 120 μg) compared with daily FSH (moderate certainty).
Repeated single embryo transfer (mixed policies) showed no clear difference in cumulative live birth compared with multiple embryo transfer (low certainty).
It is very uncertain whether the intervention changes live birth/ongoing pregnancy ‐ low vs high dose protocol (very low certainty).
It is very uncertain whether day 3 changes live birth rate per woman compared with day 2 embryo transfer following IVF or ICSI (very low certainty).
The intervention showed no clear difference in live birth or ongoing pregnancy Low dose vaginal vs high dose vaginal (moderate certainty).
Endometrial injury showed no clear difference in live birth per woman randomised (studies at low risk of selection… compared with control (moderate certainty).
The intervention showed no clear difference in live birth; type of antioxidant (natural conceptions and undergoing… (low certainty).
Letrozole with or without adjuncts leads to higher live birth rate compared with SERMs with or without adjuncts followed by timed intercourse (high certainty).
It is very uncertain whether hyaluronic acid‐selected sperm (HA‐ICSI) changes live birth per woman randomly assigned compared with viscous medium containing HA (SpermSlow) (very low certainty).
It is very uncertain whether higher changes live birth per woman randomised: sensitivity analysis (including all… compared with lower degree of injury (very low certainty).