Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

55 questions · 59 findings · 3 reviews

No studies found 22 · 37.3%GRADE not reported 0 · 0%Very low 10 · 16.9%Low 19 · 32.2%Moderate 7 · 11.9%High 1 · 1.7%

Combined oral contraceptive pill vs no pretreatment

Live birth or ongoing pregnancy · women undergoing assisted reproduction

Combined oral contraceptive pill probably leads to lower live birth or ongoing pregnancy (COCP + Ant vs Ant) compared with no pretreatment (moderate certainty).

2 findings from 1 review

Combined oral contraceptive pill vs no pretreatment

Pregnancy loss · women undergoing assisted reproduction

Combined oral contraceptive pill showed no clear difference in pregnancy loss (COCP + Ant vs Ant) compared with no pretreatment (moderate certainty).

2 findings from 1 review

Combined oral contraceptive pill vs no pretreatment

Multiple pregnancy rate · women undergoing assisted reproduction

Combined oral contraceptive pill showed no clear difference in multiple pregnancy rate (COCP + Ant vs Ant) compared with no pretreatment (low certainty).

2 findings from 1 review

Combined oral contraceptive pill vs no pretreatment

OHSS · women undergoing assisted reproduction

Combined oral contraceptive pill showed no clear difference in OHSS rate (COCP + Ant vs Ant) compared with no pretreatment (low certainty).

2 findings from 1 review