Regarding Fertilization & implantation:

waelhammad

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2022-11-22

Fertilization occurs in the inner third of the fallopian tube.
The sperm head penetrates through the corona radiata & zona pellucida while the tail remains outside.
The 2ND meiotic division is completed before fertilization.
Implantation occurs at the morula stage.
The trophoblast invades the endometrium & differentiate into an outer cytotrophoblast & an inner cyncytiotrophoblast

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waelhammad

2022-11-22

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B. The sperm head penetrates through the corona radiata & zona pellucida while the tail remains outside.

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