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What do systematic reviews say?

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Evidence found and GRADE certainty

151 questions · 152 findings · 77 reviews · Pregnancy and Childbirth

No studies found 9 · 5.9%GRADE not reported 8 · 5.3%Very low 36 · 23.7%Low 47 · 30.9%Moderate 37 · 24.3%High 15 · 9.9%

Calcium supplementation/fortification vs placebo (outcomes

Caesarean section · women who are not yet pregnant and women in the early stages of pregnancy

Calcium supplementation showed no clear difference in caesarean section compared with placebo (maternal outcomes) commencing before or early (low certainty).

1 finding from 1 review

Upright position vs recumbent position

Caesarean section · women in the second stage of labour with epidural anaesthesia

Upright position leads to higher caesarean section compared with recumbent position (sensitivity analyses ‐ studies at low risk of… (high certainty).

2 findings from 1 review

Planned elective birth (induction or caesarean) vs expectant management

Caesarean section · pregnant women with gestational diabetes, between 38 ‐ 39 gestational weeks, without other maternal or fetal conditions.

It is very uncertain whether planned elective birth (induction or caesarean) changes caesarean section compared with expectant management (very low certainty).

1 finding from 1 review

Acupressure vs usual care

Caesarean section · women in the third trimester for induction of labour.

Acupressure showed no clear difference in caesarean section compared with usual care (moderate certainty).

1 finding from 1 review