Egg freezing does not increase chance of chromosome abnormalities

A reassuring study in the October 2010 issue of Fertility & Sterility demonstrates that blastocysts created from previously vitrified eggs are not at risk for an increased risk of abnormal chromosome configuration (aneuploidy) and have equivalent reproductive potential to those created from fresh eggs.

To assess the risk they froze half of the eggs by vitrification and compared the results of preimplantation genetic screening (PGS) from trophectoderm biopsies in blastocysts and compared the results with embryos created with fresh eggs. There was no statistical difference in the rate of aneuploidy or the ongoing pregnancy rate per embryo transferred.

This is very reassuring information both the individuals seeking fertility preservation and those wanting to use frozen eggs for egg donation. For more information please check our web pages on egg freezing for fertility preservation and the Donor Egg Bank USA for information on egg donation using frozen eggs.

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