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It is very uncertain whether oral progesterone changes ongoing pregnancy rate compared with vaginal progesterone (very low certainty).
It is very uncertain whether oral progesterone changes miscarriage rate per clinical pregnancy compared with vaginal progesterone (very low certainty).
It is very uncertain whether oral progesterone changes clinical pregnancy rate compared with vaginal progesterone (very low certainty).
The review found no eligible studies for this question.
The review found no eligible studies for this question.
It is very uncertain whether aqueous subcutaneous (Sc) progesterone changes ongoing pregnancy rate compared with vaginal progesterone gel (very low certainty).
Progesterone may leads to higher clinical pregnancy per woman compared with no treatment or placebo (route of progesterone administration) (low certainty).
It is very uncertain whether aqueous subcutaneous (Sc) progesterone changes clinical pregnancy rate compared with vaginal progesterone gel (very low certainty).
It is very uncertain whether subcutaneous (Sc) gonadotropin‐releasing hormone (GnRH) agonist changes ongoing pregnancy rate compared with placebo/no treatment (very low certainty).
It is very uncertain whether subcutaneous (Sc) gonadotropin‐releasing hormone (GnRH) agonist changes clinical pregnancy rate compared with placebo/no treatment (very low certainty).
It is very uncertain whether subcutaneous (Sc) gonadotropin‐releasing hormone (GnRH) agonist changes multiple pregnancy rate compared with placebo/no treatment (very low certainty).
The review found no eligible studies for this question.
It is very uncertain whether vaginal progesterone changes clinical pregnancy rate compared with gonadotropin‐releasing hormone (GnRH) agonist (very low certainty).
It is very uncertain whether human chorionic gonadotropin (hCG) injection changes clinical pregnancy rate compared with no treatment (very low certainty).
It is very uncertain whether human chorionic gonadotropin (hCG) injection changes multiple pregnancy rate compared with no treatment (very low certainty).
It is very uncertain whether progesterone changes clinical pregnancy per woman ‐ oral route compared with no treatment or placebo (route of progesterone administration) (very low certainty).
Progesterone showed no clear difference in multiple pregnancy per woman compared with no treatment or placebo (route of progesterone administration) (low certainty).
The review found no eligible studies for this question.
Progesterone showed no clear difference in live birth rate/ongoing pregnancy rate compared with placebo/no treatment (low certainty).
Progesterone showed no clear difference in miscarriage rate per clinical pregnancy compared with placebo/no treatment (low certainty).