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Trophoblasts (from Greek threphein: to feed) are cells forming the outer layer of a blastocyst, which provide nutrients to the embryo and develop into a large part of the placenta. They are formed during the first stage of pregnancy and are the first cells to differentiate from the fertilized egg.
Additional recommended knowledge
Trophoblasts are invasive, eroding, and metastasizing cells of the placenta.
The trophoblast proliferates and differentiates into 2 cell layers:
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Trophoblast". A list of authors is available in Wikipedia.