Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,126 questions · 1,225 findings · 111 reviews

No studies found 235 · 19.2%GRADE not reported 260 · 21.2%Very low 207 · 16.9%Low 271 · 22.1%Moderate 177 · 14.4%High 75 · 6.1%

Preconception lifestyle advice on a combination of topics vs usual care or attention control

Reported behavioural changes on vitamin or mineral supplement intake: number of women with adequate use of folic acid supplement · people with infertility

Preconception lifestyle advice on a combination of topics showed no clear difference in reported behavioural changes on vitamin or mineral supplement… compared with routine care or attention control (low certainty).

1 finding from 1 review

Dietary supplements vs placebo

Dill seed versus placebo Pain score · women with moderate or severe primary dysmenorrhoea
3 findings from 1 review