Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,809 questions · 1,956 findings · 194 reviews

No studies found 422 · 21.6%GRADE not reported 427 · 21.8%Very low 353 · 18%Low 397 · 20.3%Moderate 293 · 15%High 64 · 3.3%

Combined oral contraceptive pill vs placebo or no treatment

Self‐reported pain (dysmenorrhoea) at the end of treatment (continuous data): dysmenorrhoea at 6 months' · women with endometriosis
2 findings from 1 review

Combined oral contraceptive pill vs any other medical treatment

Self‐reported pain (dysmenorrhoea) at the end of treatment (continuous data): dysmenorrhoea at 6 months' · women with endometriosis
2 findings from 1 review

Combined oral contraceptive pill vs any other medical treatment

Self‐reported pain (dysmenorrhoea) (dichotomous data) ‐ reduction of pain to zero at 6 months' · women with endometriosis

It is very uncertain whether combined oral contraceptive pill changes self‐reported pain (dysmenorrhoea) (dichotomous data): reduction of… compared with other medical treatment (very low certainty).

2 findings from 1 review

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