Regrading fertilization and implantation:

waelhammad

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2022-11-27

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

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waelhammad

2022-11-27

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

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