Research indicates frozen embryo transfer is associated with a lower risk of ectopic pregnancy

Research by Zhang et al (2017) compared the risk of ectopic pregnancy in fresh and frozen thawed embryo cycles. A retrospective study was conducted and a total of 69, 756 embryo transfer cycles were analysed, including 45, 960 fresh cycles and 23, 796 frozen cycles. Frozen thawed embryo transfer is associated with a lower incidence of ectopic pregnancy per clinical pregnancy. Within frozen thawed embryo transfer cycles, blastocyst transfer shows a significantly lower risk of ectopic pregnancy in comparison with day 3 cleavage embryo transfer.

For more information, please see the Sage Journal article

This study is funded by the National Institute for Health Research (NIHR) Health Technology Assessment (HTA) Programme (Reference Number 13/115/82). The views expressed are those of the author(s) and not necessarily those of the NIHR or the Department of Health and Social Care.