Vitamin A plus iron plus folate showed no clear difference in total fetal loss (including miscarriages or combined miscarriages… compared with iron plus folate (low certainty).
Vitamin A plus iron plus folate showed no clear difference in early or late miscarriage ‐ Vitamin A + iron + folate versus iron +… compared with iron plus folate (low certainty).
Vitamin A plus iron plus folate showed no clear difference in stillbirth ‐ Vitamin A + iron + folate versus iron + folate compared with iron plus folate (low certainty).
Vitamin A alone showed no clear difference in maternal mortality compared with placebo or no treatment (high certainty).
Vitamin A alone showed no clear difference in perinatal mortality compared with placebo or no treatment (high certainty).
Vitamin A alone probably leads to lower maternal anaemia compared with placebo or no treatment (moderate certainty).
Vitamin A alone may leads to lower maternal clinical infection compared with placebo or no treatment (low certainty).
Vitamin A alone showed no clear difference in preterm birth compared with placebo or no treatment (high certainty).
The review found no eligible studies for this question.
It is very uncertain whether summary of findings table ‐ Vitamin B12 supplementation changes maternal vitamin B12 deficiency compared with placebo/no vitamin B12 supplementation (very low certainty).
Vitamin C and vitamin E showed no clear difference in any adverse effects of vitamin supplementation sufficient to stop… compared with placebo (moderate certainty).
Vitamin A supplementation (200,000 to 400,000 IU) showed no clear difference in maternal mortality compared with placebo or no treatment (moderate certainty).
Vitamin A supplementation (200,000 to 400,000 IU) showed no clear difference in maternal adverse effects after administration: abdominal pain compared with placebo or no treatment (low certainty).
Vitamin A supplementation (200,000 to 400,000 IU) showed no clear difference in infant mortality compared with placebo or no treatment (low certainty).
It is very uncertain whether vitamin A supplementation (200,000 to 400,000 IU) changes infant morbidity (gastroenteritis) compared with placebo or no treatment (very low certainty).
Vitamin A supplementation (200,000 to 400,000 IU) showed no clear difference in infant adverse effects: bulging fontanelle compared with placebo or no treatment (low certainty).
Multivitamin plus iron plus folate showed no clear difference in early or late miscarriage ‐ Multivitamin + iron + folic acid versus… compared with iron plus folate (moderate certainty).
Multivitamin plus iron plus folate leads to lower stillbirth ‐ Multivitamin + iron + folic acid versus iron + folic acid compared with iron plus folate (high certainty).