An expanded blastocyst is a zygote that has developed for around 5 days and has started the process of differentiation. There are three main components to a blastocyst. The inner cell mass layer of cells develops into the fetus, the trophectoderm or trophoblast develops into the placenta and the...
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To Make a Mommy is a blog about how I beat the odds and got pregnant when the doctors said it was impossible. I'm now trying for a second miracle and write about all things fertility!