Transfer of fresh or frozen embryos: a randomised controlled trial.

ABSTRACT:

Study question

Is IVF with frozen-thawed blastocyst transfer (freeze-all strategy) more effective than IVF with fresh and frozen-thawed blastocyst transfer (conventional strategy)?

Summary answer

The freeze-all strategy was inferior to the conventional strategy in terms of cumulative ongoing pregnancy rate per woman.

What is known already

IVF without transfer of fresh embryos, thus with frozen-thawed embryo transfer only (freeze-all strategy), is increasingly being used in clinical practice because of a presumed benefit. It is still unknown whether this new IVF strategy increases IVF efficacy.

Study design, size, duration

A single-centre, open label, two arm, parallel group, randomised controlled superiority trial was conducted. The trial was conducted between

SUBMITTER: Wong KM 

PROVIDER: S-EPMC7970725 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature