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Evidence found and GRADE certainty

3,971 questions · 9,849 findings · 853 reviews

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No studies found 1,150 · 11.7%GRADE not reported 3,387 · 34.4%Very low 1,963 · 19.9%Low 1,809 · 18.4%Moderate 1,207 · 12.3%High 333 · 3.4%

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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

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

Cycle cancellation rate · women undergoing embryo transfer with frozen embryos or embryos derived from donor oocytes

Starting administration of the progestogen earlier probably leads to lower cycle cancellation 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

Other adverse effects · 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

GnRH agonists vs placebo

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

It is very uncertain whether among different GnRH agonists changes clinical pregnancy rate compared with placebo (very low certainty).

1 finding from 1 review