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Evidence found and GRADE certainty

2,289 questions · 2,331 findings · 195 reviews · Pregnancy and Childbirth

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No studies found 480 · 20.6%GRADE not reported 288 · 12.4%Very low 467 · 20%Low 630 · 27%Moderate 338 · 14.5%High 128 · 5.5%

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

Intervention not reported

Postnatal depression · pregnant women

The intervention showed no clear difference in postnatal depression (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

Intervention not reported

Adverse maternal psychological effects (anxiety, depression or complicated grief) ‐ not measured · women with a previous stillbirth of > 20 weeks' gestation who are pregnant or considering a subsequent pregnancy

The review found no eligible studies for this question.

1 finding from 1 review

Intervention not reported

Any preterm birth (birth < 37 weeks) · women with a previous stillbirth of > 20 weeks' gestation who are pregnant or considering a subsequent pregnancy

It is very uncertain whether the intervention changes any preterm birth (birth < 37 weeks) (very low certainty).

1 finding from 1 review

Intervention not reported

Adverse maternal psychological effects (anxiety, depression or complicated grief) · women with a previous stillbirth of ≥ 20 weeks' gestation who are pregnant or considering a subsequent pregnancy

It is very uncertain whether the intervention changes adverse maternal psychological effects (anxiety, depression or… (very low certainty).

1 finding from 1 review

Intervention not reported

Any preterm birth (birth < 37 weeks) · women with a previous stillbirth of ≥ 20 weeks' gestation who are pregnant or considering a subsequent pregnancy

The intervention showed no clear difference in any preterm birth (birth < 37 weeks) (low certainty).

1 finding from 1 review

Transabdominal chorionic villus sampling vs second trimester amniocentesis

All known pregnancy loss (including termination of pregnancy) · prenatal diagnosis

Transabdominal chorionic villus sampling showed no clear difference in all known pregnancy loss (including termination of pregnancy) compared with second trimester amniocentesis (low certainty).

1 finding from 1 review

Transcervical vs transabdominal chorionic villus sampling

All known pregnancy loss (including termination of pregnancy) · prenatal diagnosis

It is very uncertain whether transcervical changes all known pregnancy loss (including termination of pregnancy) compared with transabdominal chorionic villus sampling (very low certainty).

1 finding from 1 review

Early amniocentesis vs transabdominal chorionic villus sampling

All known pregnancy loss (including termination of pregnancy) · prenatal diagnosis

Early amniocentesis showed no clear difference in all known pregnancy loss (including termination of pregnancy) compared with transabdominal chorionic villus sampling (low certainty).

1 finding from 1 review

Intervention not reported

Preterm birth less than 34 weeks' gestation · women undergoing home monitoring for preventing preterm birth versus women receiving standard care

The intervention leads to lower preterm birth less than 34 weeks' gestation (high certainty).

1 finding from 1 review

Intervention not reported

Preterm birth less than 37 weeks' gestation · women undergoing home monitoring for preventing preterm birth versus women receiving standard care

It is very uncertain whether the intervention changes preterm birth less than 37 weeks' gestation (very low certainty).

1 finding from 1 review

Dietary advice vs standard‐of‐care therapy

Hypertensive disorders of pregnancy (pregnancy‐induced hypertension) · pregnant women

Dietary advice interventions may leads to lower hypertensive disorders of pregnancy (pregnancy‐induced hypertension) compared with standard care (maternal outcomes) (low certainty).

1 finding from 1 review

Adverse event outcomes for dietary combined with physical activity interventions vs standard‐of‐care therapy

Hypertensive disorders of pregnancy (pregnancy‐induced hypertension) · pregnant women, excluding women already diagnosed with GDM in this pregnancy and those with pre‐existing diabetes mellitus

It is very uncertain whether combined diet and exercise interventions changes hypertensive disorders of pregnancy (pregnancy‐induced… compared with standard care (mother) (very low certainty).

1 finding from 1 review