It is very uncertain whether albendazole changes seizure recurrence ‐ participants with multiple (> 1) cysts compared with placebo or no anthelmintics (very low certainty).
Assisted hatching may leads to higher multiple pregnancy rate per woman randomised compared with no assisted hatching (low certainty).
Double intrauterine insemination (IUI) showed no clear difference in multiple pregnancy ratea compared with single IUI (low certainty).
The intervention showed no clear difference in case‐control ‐ multiple sclerosis (low certainty).
It is very uncertain whether gonadotropins with GnRH agonists changes multiple pregnancy rate per couple compared with gonadotropins alone (very low certainty).
Gonadotropins with GnRH antagonist showed no clear difference in multiple pregnancy rate per couple compared with gonadotropins alone (moderate certainty).
Gonadotropins showed no clear difference in multiple pregnancy rate per couple compared with anti‐oestrogens (low certainty).
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 aromatase inhibitors changes multiple pregnancy rate per couple compared 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).
Aromatase inhibitors showed no clear difference in multiple pregnancy rate per couple compared with anti‐oestrogens (low certainty).
It is very uncertain whether chinese herbal medicine (CHM) plus follicle aspiration plus… changes multiple pregnancy (adverse events) compared with follicle aspiration plus ovulation induction (very low certainty).
It is very uncertain whether dopamine agonist plus co‐intervention changes multiple pregnancy rate compared with co‐intervention (very low certainty).
Dopamine agonist showed no clear difference in multiple pregnancy rate compared with other active intervention (low certainty).
It is very uncertain whether dopamine agonist changes multiple pregnancy rate compared with placebo/no intervention (very low certainty).
It is very uncertain whether fresh changes multiple pregnancy rate: cumulatively compared with frozen embryo transfer (cumulatively) (very low certainty).
LOD with and without medical ovulation probably leads to lower multiple pregnancy compared with medical ovulation induction alone (moderate certainty).
The review found no eligible studies for this question.
IUI in a stimulated cycle showed no clear difference in multiple pregnancy rate per couple compared with TI or expectant management (low certainty).