Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,667 questions · 21,760 findings · 2,177 reviews

No studies found 4,173 · 19.2%GRADE not reported 2,300 · 10.6%Very low 5,276 · 24.2%Low 5,764 · 26.5%Moderate 3,298 · 15.2%High 949 · 4.4%

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Intervention not reported

Pregnancy rate (clinical or positive urine pregnancy test) · couples trying to conceive

It is very uncertain whether the intervention changes pregnancy rate (clinical or positive urine pregnancy test) (very low certainty).

1 finding from 1 review

Intervention not reported

Time to pregnancy · couples trying to conceive

The intervention showed no clear difference in time to pregnancy (low certainty).

1 finding from 1 review

Intervention not reported

Clinical pregnancy rate · couples trying to conceive

The intervention showed no clear difference in clinical pregnancy rate (low certainty).

1 finding from 1 review

Intervention not reported

Pregnancy rate(clinical pregnancy or urine pregnancy test) · couples trying to conceive

The intervention probably leads to higher pregnancy rate(clinical pregnancy or urine pregnancy test) (moderate certainty).

1 finding from 1 review

Intervention not reported

Time to pregnancy · couples trying to conceive

It is very uncertain whether the intervention changes time to pregnancy (very low certainty).

1 finding from 1 review

Intervention not reported

Clinical pregnancy rate · couples trying to conceive

It is very uncertain whether the intervention changes clinical pregnancy rate (very low certainty).

1 finding from 1 review