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The E-Freeze trial results have now been published

View full results


E-Freeze is a multi-centre randomised controlled trial that compares fresh embryo transfer with frozen thawed embryo transfer for couples undergoing their first, second or third round of fertility treatment. The main aim of E-Freeze is to understand if there is any difference in the chance of having a healthy baby.


Total: 619

Recruitment to the E-Freeze trial is closed.
We would like to thank all the couples and site staff who took part.

General Information and Protocol
Information for Couples

Trial Information

EudraCT No.:
REC Reference:
Clinical Trials Unit:
National Perinatal Epidemiology Unit CTU
University of Aberdeen
NIHR Health Technology Assessment (HTA) Programme
Recruitment Target:
1,086 couples
Duration of Study:
August 2015 - July 2019
Logo: Human Fertilisation and Embryology Authority
Fertility Network UK

Updated: Tuesday, 22 March 2022 15:58 (v52)