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 (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
Preterm birth · patients with asymptomatic bacteriuria during pregnancy
Antibiotics may leads to lower preterm birth < 37 weeks compared with no treatment (low certainty).
1 finding from 1 review
Preterm birth · women with singleton pregnancies and threatened preterm labor (PTL) between 23 to 35 weeks
Main comparison (FFN knowledge showed no clear difference in preterm birth < 37 weeks compared with no knowledge) (low certainty).
1 finding from 1 review
Preterm birth less than 34 weeks' gestation · women with singleton pregnancies and threatened preterm labor (PTL) between 23 to 35 weeks
Main comparison (FFN knowledge showed no clear difference in preterm birth < 34 weeks compared with no knowledge) (low certainty).
1 finding from 1 review
Preterm birth < 32 weeks · women with singleton pregnancies and threatened preterm labor (PTL) between 23 to 35 weeks
It is very uncertain whether main comparison (FFN knowledge changes preterm birth < 32 weeks compared with no knowledge) (very 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 · women with mild to moderate hypertension during pregnancy
Any antihypertensive drug showed no clear difference in preterm birth (< 37 weeks) compared with no antihypertensive drugs/placebo (moderate certainty).
1 finding from 1 review
Intervention not reported
Preterm birth < 37 weeks · pregnant women and their babies
The intervention leads to lower preterm birth < 37 weeks (high certainty).
1 finding from 1 review
Preterm birth · women with breech presentation before term
External cephalic version (ECV) commenced before term leads to higher preterm birth < 37 weeks compared with ECV at term (high certainty).
1 finding from 1 review
Preterm birth · pregnant women with a history of one or more UTI before or during pregnancy
It is very uncertain whether nitrofurantoin and close surveillance changes preterm birth (< 37 weeks) compared with close surveillance alone (very low certainty).
1 finding from 1 review
Intervention not reported
Early preterm birth < 34 weeks · pregnant women and their babies
The intervention leads to lower early preterm birth < 34 weeks (high certainty).
1 finding from 1 review
Gestational age (preterm birth < 37 weeks) · Pregnant women who smoke
Outcomes for all interventions for smoking cessation in pregnancy showed no clear difference in preterm birth (under 37 weeks) compared with control: subgrouped by main intervention strategy (comparison 20) (high certainty).
1 finding from 1 review
Gestational age (preterm birth < 37 weeks) · Pregnant women in unselected or low‐risk populations.
All routine Doppler ultrasound showed no clear difference in preterm birth (before 37 weeks) compared with no Doppler ultrasound (high 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