Preterm birth less than 34 weeks' gestation
It is very uncertain whether cervical cerclage in combination with antibiotics and tocolytics changes preterm birth < 34 completed weeks of pregnancy compared with cervical cerclage alone (very low certainty).
1 finding from 1 review
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
Intramuscular (IM) progesterone may leads to higher preterm birth less than 34 weeks compared with no treatment or placebo (low certainty).
1 finding from 1 review
Preterm birth less than 28 weeks · Women with a multiple pregnancy
Intramuscular (IM) progesterone showed no clear difference in preterm birth less than 28 weeks compared with no treatment or placebo (moderate certainty).
1 finding from 1 review
Preterm birth · Women with a multiple pregnancy
Intramuscular (IM) progesterone showed no clear difference in preterm birth less than 37 weeks compared with no treatment or placebo (high 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
Preterm birth · women with a twin pregnancy
Oral betamimetic showed no clear difference in preterm birth (less than 37 weeks' gestation) compared with placebo (low certainty).
1 finding from 1 review
Preterm birth less than 34 weeks' gestation · women with a twin pregnancy
Oral betamimetic showed no clear difference in very preterm birth (less than 34 weeks' gestation) compared with placebo (low certainty).
1 finding from 1 review
Intervention not reported
Preterm birth < 34 weeks · women carrying twins, asymptomatic for PTL or PPROM
It is very uncertain whether the intervention changes preterm birth < 34 weeks (very low certainty).
1 finding from 1 review
Intervention not reported
Preterm birth < 37 weeks · singleton pregnancy with symptoms of PTL
It is very uncertain whether the intervention changes preterm birth < 37 weeks (very low certainty).
1 finding from 1 review
Preterm birth · pregnant women
Summary of findings: lipid‐based nutrient supplements (LNS) showed no clear difference in preterm births (births before 37 weeks of gestation) compared with multiple micronutrients (MMN) (moderate certainty).
1 finding from 1 review
Preterm birth · pregnant women
Summary of findings: lipid‐based nutrient supplements (LNS) showed no clear difference in preterm births (births before 37 weeks of gestation) compared with iron folic acid (IFA) (moderate certainty).
1 finding from 1 review
Preterm birth · pregnant women presenting for routine prenatal care
Lower genital tract infection screening probably leads to lower preterm birth less than 37 weeks compared with no screening (moderate certainty).
1 finding from 1 review
Preterm birth · childbearing women and their infants (all) (important/secondary outcomes)
Summary of findings table ‐ Midwife continuity of care models showed no clear difference in preterm birth (< 37 weeks) compared with other models of care (low certainty).
1 finding from 1 review
Preterm birth · pregnant women
Summary of findings table ‐ Vitamin B12 supplementation showed no clear difference in preterm birth (< 37 weeks) compared with placebo/no vitamin B12 supplementation (low certainty).
1 finding from 1 review
Preterm birth · pregnant women
It is very uncertain whether respiratory syncytial virus vaccine changes preterm birth compared with placebo (very low certainty).
1 finding from 1 review
Preterm birth · Pregnant women (healthy and probable zinc deficiency)
Zinc supplementation showed no clear difference in preterm birth (< 37 weeks) compared with no zinc (with or without placebo) (low certainty).
1 finding from 1 review
Gestational age (preterm birth < 37 weeks) · pregnant women in second trimester of pregnancy
Antihelminthics showed no clear difference in preterm birth (birth before 37 weeks of gestation) compared with control (low certainty).
1 finding from 1 review
Preterm birth less than 34 weeks' gestation · pregnant women with chronic or gestational hypertension
Setting of BP measurement: self‐measurement showed no clear difference in preterm birth (birth before 34 completed weeks' gestation) compared with conventional clinic measurement (low certainty).
1 finding from 1 review