Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

511 questions · 561 findings · 70 reviews · Gynaecology and Fertility

No studies found 91 · 16.2%GRADE not reported 5 · 0.9%Very low 140 · 25%Low 219 · 39%Moderate 98 · 17.5%High 8 · 1.4%

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

Opioids vs placebo or no treatment

Nausea and vomiting sublingual opioid · women undergoing outpatient hysteroscopy

Opioid may leads to higher nausea and vomiting sublingual opioid compared with placebo or no treatment (low certainty).

1 finding from 1 review