By the time of implantation in uterine endometrium the typical feilized ovum is divided into how many cells
Correct Answer: 16
Description: Implantation is the attachment of the blastocyst to the endometrium, and its subsequent embedding in the compact layer, occurring 6-7 days after feilization of the oocyte in humans. Blastocyst is a pre-implantation embryo consisting of a thin-walled hollow sphere of 16-32 cells, which appears in early mammalian development, the wall of which is the trophoblast.Ref: Ganong&;s review of medical physiology; 24th edition; page no:-413
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