Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

516 questions · 545 findings · 51 reviews · Gynaecology and Fertility

No studies found 129 · 23.7%GRADE not reported 5 · 0.9%Very low 196 · 36%Low 162 · 29.7%Moderate 51 · 9.4%High 2 · 0.4%

Natural cycle vs programmed cycle

Clinical pregnancy rate · women undergoing embryo transfer with frozen embryos or embryos derived from donor oocytes

It is very uncertain whether natural cycle changes clinical pregnancy rate compared with programmed cycle (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