Science Fair Project Encyclopedia
Trophoblast
The trophoblast (from Greek threphein: to feed) is considered to be the first of all embryonic annexes. It secretes hCG in order to maintain progesterone secretion and sustain a pregnancy.
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details


