Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

949 questions · 1,008 findings · 130 reviews · Gynaecology and Fertility

No studies found 195 · 19.3%GRADE not reported 30 · 3%Very low 346 · 34.3%Low 323 · 32%Moderate 101 · 10%High 13 · 1.3%

Any anti‐adhesion therapy vs placebo or no treatment following operative hysteroscopy

Presence of intrauterine adhesions at second‐look hysteroscopy (6‐12 weeks) · women treated by operative hysteroscopy for uterine pathology associated with subfertility or adverse pregnancy outcome

Any anti‐adhesion therapy may leads to lower presence of intrauterine adhesions at second‐look hysteroscopy… compared with placebo or no treatment following operative hysteroscopy (low certainty).

1 finding from 1 review

Embryo culture with low oxygen concentration vs embryo culture with atmospheric oxygen concentration

Ongoing pregnancy · Patients with ongoing pregnancy

Embryo culture with low oxygen concentration probably leads to higher ongoing pregnancy rate compared with embryo culture with atmospheric oxygen concentration (moderate certainty).

1 finding from 1 review

Embryo culture with low oxygen concentration vs embryo culture with atmospheric oxygen concentration

Clinical pregnancy rate · Patients with clinical pregnancy rate

Embryo culture with low oxygen concentration probably leads to higher clinical pregnancy rate compared with embryo culture with atmospheric oxygen concentration (moderate certainty).

1 finding from 1 review

Embryo culture with low oxygen concentration vs embryo culture with atmospheric oxygen concentration

Multiple pregnancy rate · Patients with multiple pregnancy rate

Embryo culture with low oxygen concentration showed no clear difference in multiple‐pregnancy rate compared with embryo culture with atmospheric oxygen concentration (low certainty).

1 finding from 1 review

Presurgical medical therapy vs postsurgical medical therapy

Pain recurrence (dichotomous) Pain recurrence ≤ 12 months · women having endometriosis surgery

Presurgical medical therapy showed no clear difference in pain recurrence (dichotomous) Pain recurrence ≤ 12 months compared with postsurgical medical therapy (low certainty).

1 finding from 1 review