A recent study, presented at the large international infertility conference–ESHRE, shows no benefit in IVF from routinely freezing all embryos before transfer. Dr Ernesto Bosch of the Valenciano de Infertilidad (IVI) clinic in Valencia, Spain presented the results of the study. This large Spanish study found no evidence that routinely freezing all embryos and delaying transfer to a subsequent cycle improves IVF outcome in terms of ongoing pregnancy or live birth rates in women with a normal response to ovarian stimulation. Dr. Bosch noted that treatment cost and time to pregnancy are both lower in fresh embryo transfers. The doctor also said that there is still good evidence that a freeze-all approach lowers or removes the small risk of ovarian hyperstimulation syndrome (OHSS) in IVF, which is increased following conception.
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