Q:

Syncytiotrophoblast and extraembryonic mesodenn is established in the:

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Syncytiotrophoblast and extraembryonic mesodenn is established in the:


  1. conceptus before implantation is started
  2. conceptus after implantation is started
  3. both A and B
  4. neither A nor B

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B. conceptus after implantation is started

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