Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,510 questions · 2,653 findings · 194 reviews · Gynaecology and Fertility

No studies found 531 · 20%GRADE not reported 76 · 2.9%Very low 826 · 31.1%Low 855 · 32.2%Moderate 341 · 12.9%High 24 · 0.9%

LNG‐IUS vs non‐intrauterine progestogen

Adverse effects associated with hormones:Bleeding/spotting Nausea Weight gain · endometrial hyperplasia

It is very uncertain whether LNG‐IUS changes adverse effects associated with hormones:Bleeding/spotting Nausea… compared with non‐intrauterine progestogen (very low certainty).

1 finding from 1 review

Embryo culture supernatant injection vs no intervention

Live birth or ongoing pregnancy · Subfertile women undergoing assisted reproduction

It is very uncertain whether embryo culture supernatant injection changes live birth/ongoing pregnancy compared with no intervention (very low certainty).

1 finding from 1 review