Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,587 questions · 5,761 findings · 495 reviews

No studies found 1,011 · 17.5%GRADE not reported 1,797 · 31.2%Very low 1,100 · 19.1%Low 1,052 · 18.3%Moderate 649 · 11.3%High 152 · 2.6%

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Summary of findings table ‐ Progestogens vs placebo or no pretreatment

Live birth or ongoing pregnancy · ovarian stimulation protocols for women undergoing ART

Progestogen showed no clear difference in live birth or ongoing pregnancy (Prog + Ant vs Ant) compared with placebo or no pretreatment (low certainty).

2 findings from 1 review

Summary of findings table ‐ Progestogens vs placebo or no pretreatment

Pregnancy loss · ovarian stimulation protocols for women undergoing ART

Progestogen showed no clear difference in pregnancy loss (Prog + Ag vs Ag) compared with placebo or no pretreatment (low certainty).

2 findings from 1 review

Summary of findings table ‐ Progestogens vs placebo or no pretreatment

Multiple pregnancy rate · ovarian stimulation protocols for women undergoing ART

The review found no eligible studies for this question.

2 findings from 1 review

Summary of findings table ‐ Progestogens vs placebo or no pretreatment

OHSS · ovarian stimulation protocols for women undergoing ART

The review found no eligible studies for this question.

2 findings from 1 review

Oestrogen vs no pretreatment

Live birth or ongoing pregnancy · ovarian stimulation protocols for women undergoing ART

Oestrogen showed no clear difference in live birth or ongoing pregnancy (Oestr + Ant vs Ant) compared with no pretreatment (moderate certainty).

2 findings from 1 review

Oestrogen vs no pretreatment

Pregnancy loss · ovarian stimulation protocols for women undergoing ART

It is very uncertain whether oestrogen changes pregnancy loss (Oestr + Ant vs Ant) compared with no pretreatment (very low certainty).

2 findings from 1 review

Oestrogen vs no pretreatment

Multiple pregnancy rate · ovarian stimulation protocols for women undergoing ART

The review found no eligible studies for this question.

2 findings from 1 review