BLASTOCYST

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n. in embryology, refers to an inner cell mass surrounded by a layer of outer cells known as the trophoblast. It is formed 5 to 6 days after fertilization. After completing its journey through the fallopian tube, it implants on the uterine wall and eventually develops into the embryo.

BLASTOCYST: "A woman may or may not report some spotting at around the time that the blastocyst implants on the wall of the uterus."
Cite this page: N., Sam M.S., "BLASTOCYST," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/blastocyst/ (accessed August 19, 2022).

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