Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,721 questions · 19,640 findings · 2,039 reviews · Headline outcomes only

No studies found 3,754 · 19.1%GRADE not reported 1,273 · 6.5%Very low 4,859 · 24.7%Low 5,568 · 28.4%Moderate 3,240 · 16.5%High 946 · 4.8%

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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

Intervention not reported

Breast cancer stage at the time of presentation: defined as the proportion of women with breast cancer diagnosed at early stage (stage 0, I, II) Time of outcome assessment: 3 years to 20 years Method of measurement: CBE · health workers

The intervention may leads to higher breast cancer stage at the time of presentation: defined as the… (low certainty).

1 finding from 1 review