Q:

How soon after fertilization occurs within the uterine tube does the blastocyst begin implantation?

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How soon after fertilization occurs within the uterine tube does the blastocyst begin implantation?


  1. Within minutes
  2. By 12 hours
  3. By day 1
  4. By day 2
  5. By day 7

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E. The blastocyst begins implantation by day 7 after fertilization.

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