alleryImplantation is the embedding of which stage in the uterine endometrium?
AUnfertilised secondary oocyte
BBlastocyst
CPrimary oocyte
DTwo-cell embryo in the ovary
Answer & Solution
Correct answer: B. Blastocyst
Cleavage produces a morula and then a blastocyst. Its trophoblast attaches to endometrium, and proliferating uterine cells cover it, embedding the blastocyst.
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