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%

Transdermal oestrogens vs oral oestrogens

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

Transdermal oestrogens showed no clear difference in clinical pregnancy rate compared with oral oestrogens (low certainty).

1 finding from 1 review

Starting administration of the progestogen earlier vs starting administration of the progestogen later

Live birth rate · women undergoing embryo transfer with frozen embryos or embryos derived from donor oocytes

The review found no eligible studies for this question.

1 finding from 1 review

Starting administration of the progestogen earlier vs starting administration of the progestogen later

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

Starting administration of the progestogen earlier probably leads to higher clinical pregnancy rate compared with starting administration of the progestogen later (moderate certainty).

1 finding from 1 review

Starting administration of the progestogen earlier vs starting administration of the progestogen later

Miscarriage · women undergoing embryo transfer with frozen embryos or embryos derived from donor oocytes

It is very uncertain whether starting administration of the progestogen earlier changes miscarriage Rate compared with starting administration of the progestogen later (very low certainty).

1 finding from 1 review