What do systematic reviews say?

A dose of vitamin D 601 IU or higher vs 600 IU or lower alone or with other nutrients

It is very uncertain whether A dose of vitamin D 601 IU or higher changes low birthweight compared with 600 IU or lower alone or with other nutrients (very low certainty).

• Regimens of vitamin D supplementation for women during pregnancy 2019 · Cochrane Headline outcomes only
  RR 0.9 [0.66, 1.24]
  4 studies · 1550 participants
  Very low

Prevention of eclampsia: higher vs lower IV maintenance regimen

• Alternative magnesium sulphate regimens for women with pre‐eclampsia and eclampsia 2023 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 148 participants
  Very low

Prevention of eclampsia: higher vs lower IV maintenance regimen

• Alternative magnesium sulphate regimens for women with pre‐eclampsia and eclampsia 2023 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 62 participants
  Very low

Prevention of eclampsia: higher vs lower IV maintenance regimen

• Alternative magnesium sulphate regimens for women with pre‐eclampsia and eclampsia 2023 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 86 participants
  Very low

Prevention of eclampsia: higher vs lower IV maintenance regimen

The review found no eligible studies for this question.

• Alternative magnesium sulphate regimens for women with pre‐eclampsia and eclampsia 2023 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Prevention of eclampsia: higher vs lower IV maintenance regimen

Prevention of eclampsia: higher showed no clear difference in side effects compared with lower IV maintenance regimen (low certainty).

• Alternative magnesium sulphate regimens for women with pre‐eclampsia and eclampsia 2023 · Cochrane Headline outcomes only
  RR 0.79 [0.61, 1.01]
  1 study · 62 participants
  Low

Prevention of eclampsia: higher vs lower IV maintenance regimen

The review found no eligible studies for this question.

• Alternative magnesium sulphate regimens for women with pre‐eclampsia and eclampsia 2023 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Prevention of eclampsia: higher vs lower IV maintenance regimen

The review found no eligible studies for this question.

• Alternative magnesium sulphate regimens for women with pre‐eclampsia and eclampsia 2023 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Prevention of eclampsia: higher vs lower IV maintenance regimen

The review found no eligible studies for this question.

• Alternative magnesium sulphate regimens for women with pre‐eclampsia and eclampsia 2023 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

A dose of vitamin D 601 IU or higher vs 600 IU or lower alone or with other nutrients

A dose of vitamin D 601 IU or higher showed no clear difference in pre‐eclampsia compared with 600 IU or lower alone or with other nutrients (low certainty).

• Regimens of vitamin D supplementation for women during pregnancy 2019 · Cochrane Headline outcomes only
  RR 0.96 [0.65, 1.42]
  5 studies · 1553 participants
  Low

A dose of vitamin D 601 IU or higher vs 600 IU or lower alone or with other nutrients

A dose of vitamin D 601 IU or higher probably leads to lower gestational diabetes compared with 600 IU or lower alone or with other nutrients (moderate certainty).

• Regimens of vitamin D supplementation for women during pregnancy 2019 · Cochrane Headline outcomes only
  RR 0.54 [0.34, 0.86]
  5 studies · 1846 participants
  Moderate

A dose of vitamin D 601 IU or higher vs 600 IU or lower alone or with other nutrients

A dose of vitamin D 601 IU or higher showed no clear difference in preterm birth compared with 600 IU or lower alone or with other nutrients (low certainty).

• Regimens of vitamin D supplementation for women during pregnancy 2019 · Cochrane Headline outcomes only
  RR 1.25 [0.92, 1.69]
  4 studies · 2294 participants
  Low