Respiratory syncytial virus vaccine showed no clear difference in intrauterine growth restriction compared with placebo (moderate certainty).
Respiratory syncytial virus vaccine showed no clear difference in stillbirth compared with placebo (low certainty).
Respiratory syncytial virus vaccine showed no clear difference in maternal death compared with placebo (low certainty).
It is very uncertain whether respiratory syncytial virus vaccine changes preterm birth compared with placebo (very low certainty).
Respiratory syncytial virus vaccine showed no clear difference in congenital abnormalities compared with placebo (high certainty).
It is very uncertain whether respiratory syncytial virus vaccine changes infant death compared with placebo (very low certainty).
Zinc supplementation showed no clear difference in preterm birth (< 37 weeks) compared with no zinc (with or without placebo) (low certainty).
Zinc supplementation showed no clear difference in stillbirth compared with no zinc (with or without placebo) (low certainty).
It is very uncertain whether zinc supplementation changes neonatal death compared with no zinc (with or without placebo) (very low certainty).
Zinc supplementation showed no clear difference in perinatal death compared with no zinc (with or without placebo) (low certainty).
Zinc supplementation showed no clear difference in small‐for‐gestational age or IUGR compared with no zinc (with or without placebo) (moderate certainty).
Zinc supplementation showed no clear difference in low Birthweight (< 2500 g) compared with no zinc (with or without placebo) (moderate certainty).
The review found no eligible studies for this question.
It is very uncertain whether peripartum/postnatal prophylaxis (caesarean): heparin (LMWH or UFH) changes symptomatic thromboembolic events (timing of assessment unclear,… compared with no treatment/placebo (very low certainty).
It is very uncertain whether peripartum/postnatal prophylaxis (caesarean): heparin (LMWH or UFH) changes symptomatic PE (timing of assessment unclear, within 6 weeks… compared with no treatment/placebo (very low certainty).
It is very uncertain whether antenatal (± postnatal) prophylaxis: heparin (LMWH or UFH) changes symptomatic thromboembolic events ( compared with no treatment/placebo (very low certainty).