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.
Freeze All Cycle
Sometimes, for various reasons, a woman may have a “freeze-all” cycle in which no embryos are replaced fresh and all the embryos are frozen for transfer in subsequent cycle(s).
Egg freezing is similar to embryo freezing except that after the eggs are retrieved following ovarian stimulation, they are frozen without being fertilized by sperm. Egg freezing is usually done either to preserve eggs when a woman is going to undergo cancer or other treatment that could permanently damage or destroy the eggs (e.g. radiation or chemotherapy), or for a woman who does not have a partner and/or does not yet want to get pregnant but wants to preserve her fertility by freezing eggs for future use. Eggs can be kept frozen for many years so that when the woman wants to use the eggs they can be thawed, fertilized with her partner’s sperm (or donor sperm if she has no partner) and the resulting embyo(s) transferred into the uterus 3 or 5 days later after the fertilization.
If you would like to learn more about your options for egg or embryo freezing, please click on the button below to get in touch with a leading fertility specialist near you.