Reporting from the European Society for Human Reproduction and Embryology's 2019 annual meeting in Vienna. Source: Shaoni Bhattacharya, Progress Educational Trust via IVF.net
Freezing embryos for later implantation or using them fresh makes no difference to the success of IVF, according to a new study.
The so-called 'freeze-all' strategy has become increasingly popular in many fertility clinics as frozen embryo transfer is thought to reduce the risk of Ovarian Hyperstimulation Syndrome (OHSS) and improve IVF outcomes generally.
In the study, some 460 patients at eight clinics across Denmark, Sweden and Spain had a single blastocyst transferred for IVF. A freeze-all approach was used in one group, with the frozen embryo transferred in a subsequent cycle. Fresh embryos were transferred in the other group.
The ongoing pregnancy rate following transfer was similar with both methods, as was the number of babies born through each method.
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Shaoni Bhattacharya, Progress Educational Trust via IVF.net