Anonymous wrote:A "frosty" is a frozen embryo or blastocyst.
You can also have a fresh embryo or blastocyst. Usually you do an egg retrieval, the egg is fertilized and you get X amount of embryos. If everything looks good and your body is ready to go then you do a fresh embryo transfer. You put the other embryos in the freezer ( and they become frosties). Sometimes you are not able to do a fresh transfer right away because your hormones are not where they should be so all the embryos would go to the freezer.
A blastocyst is about a 5 day embryo. It's a little ball of cells... more developed than a 3 day embryo. It is called an embryo until it attaches to the uterus I believe and then it becomes a fetus. Blastocyst and embryo are not mutually exclusive
Actually, it's called an embryo until your 8th week, then it becomes a fetus.
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