Q:

Which of the following structures must degenerate for blastocyst implantation to occur?

waelhammad
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2022-11-10
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Which of the following structures must degenerate for blastocyst implantation to occur?

  1. Endometrium in progestational phase
  2. Zona pellucida
  3. Syncytiotrophoblast
  4. Cytotrophoblast
  5. Functional layer of the endometrium
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waelhammad
2022-11-10
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B. The zona pellucida must degenerate for implantation to occur. Early cleavage states of the blastula are surrounded by a zona pellucida, which prevents implantation in the uterine tube.

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