What do systematic reviews say?

3 questions · 3 findings · 1 reviews · Pregnancy and Childbirth

No studies found 0 · 0%GRADE not reported 0 · 0%Very low 0 · 0%Low 2 · 66.7%Moderate 1 · 33.3%High 0 · 0%

Preterm birth · Women with a multiple pregnancy

Vaginal progesterone showed no clear difference in preterm birth less than 37 weeks compared with no treatment or placebo (moderate certainty).

1 finding from 1 review

Preterm birth less than 28 weeks · Women with a multiple pregnancy

Vaginal progesterone showed no clear difference in preterm birth less than 28 weeks compared with no treatment or placebo (low certainty).

1 finding from 1 review

Preterm birth less than 34 weeks' gestation · Women with a multiple pregnancy

Vaginal progesterone showed no clear difference in preterm birth less than 34 weeks compared with no treatment or placebo (low certainty).

1 finding from 1 review