The review found no eligible studies for this question.
Gonadotrophins with anti‐oestrogens showed no clear difference in multiple pregnancy rate per couple compared with gonadotropins alone (low certainty).
It is very uncertain whether gonadotrophins with anti‐oestrogens changes clinical pregnancy rate per couple compared with gonadotropins alone (very low certainty).
Gonadotrophins with anti‐oestrogens showed no clear difference in OHSS rate per couple compared with gonadotropins alone (low certainty).
Oestrogen‐only hormone therapy (HT) probably leads to higher venous thromboembolism (DVT or PE) compared with placebo (moderate certainty).
Oestrogen‐only hormone therapy (HT) showed no clear difference in venous thromboembolism (DVT or PE): CEE 0.625 mg (moderate dose) compared with placebo (moderate certainty).
Oestrogen‐only hormone therapy (HT) showed no clear difference in breast cancer compared with placebo (moderate certainty).
Oestrogen‐only hormone therapy (HT) probably leads to higher gallbladder disease compared with placebo (moderate certainty).
Oestrogen‐only hormone therapy (HT) probably leads to lower all clinical fractures compared with placebo (moderate certainty).
Oestrogen‐only hormone therapy (HT) showed no clear difference in coronary events (MI or cardiac death) compared with placebo (moderate certainty).
Oestrogen‐only hormone therapy (HT) probably leads to higher stroke compared with placebo (moderate certainty).
Gonadotropins probably leads to higher live birth rate per couple ‐ all types of infertility compared with anti‐oestrogens (moderate certainty).
Aromatase inhibitors showed no clear difference in miscarriage rate per couple compared with anti‐oestrogens (low certainty).
Aromatase inhibitors showed no clear difference in ectopic pregnancy rate per couple compared with anti‐oestrogens (low certainty).
Gonadotropins showed no clear difference in multiple pregnancy rate per couple compared with anti‐oestrogens (low certainty).
Gonadotropins probably leads to higher clinical pregnancy rate per couple compared with anti‐oestrogens (moderate certainty).
It is very uncertain whether aromatase inhibitors with gonadotropins changes live birth rate per couple compared with anti‐oestrogens with gonadotropins (very low certainty).
Aromatase inhibitors with gonadotropins showed no clear difference in multiple pregnancy rate per couple compared with anti‐oestrogens with gonadotropins (low certainty).
It is very uncertain whether aromatase inhibitors with gonadotropins changes clinical pregnancy rate per couple compared with anti‐oestrogens with gonadotropins (very low certainty).