Implantation of blastocyst occurs on

4 th day

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5 th day

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6 th day

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7 th day

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Solution

The correct option is A 4 th day
After the formation of blastocyst, the outer layer of blastocyst starts to embed in the endometrium of uterus and in inner cell mass further divisions take please which forms embryo. It takes place on the 4th day. The cells of endometrium starts dividing rapidly, to cover the blastocyst, and finally blastocyst get fully embeded in it resulting in implantation which further leads to pregnancy.

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5

14

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