ARC® Fertility Glossary

Embryo Freezing, Egg Freezing

Active treatment of a “fresh” IVF cycle ends when an embryo that has just been created by fertilization of an egg 3 to 5 days earlier is transferred back into the uterus. In many cases, additional embryos of good quality are available and can be frozen (embryo freezing) so that they can be used later in a frozen/thaw embryo transfer (FET) cycle, if the patient does not get pregnant with the fresh transfer. Since embryos can remain safely frozen for many years, they can also be transferred after a successful IVF cycle in order to have another child.

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