It is very uncertain whether intrauterine infusion/injection of autologous platelet‐rich plasma changes live birth (or ongoing pregnancy) compared with no intervention or placebo (very low certainty).
Progesterone showed no clear difference in live birth rate/ongoing pregnancy compared with placebo/no treatment (low certainty).
Progesterone showed no clear difference in live birth/ongoing pregnancy rate compared with no treatment or placebo (route of progesterone administration) (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 progesterone changes live birth or ongoing pregnancy compared with placebo/no treatment (very low certainty).
Progesterone showed no clear difference in live birth rate/ongoing pregnancy rate compared with placebo/no treatment (low certainty).
DHEA or testosterone probably leads to higher live birth/ongoing pregnancy rate ‐ DHEA compared with placebo/no treatment (moderate certainty).
Progestogen showed no clear difference in live birth or ongoing pregnancy (Prog + Ant vs Ant) compared with placebo or no pretreatment (low certainty).