FNP Pediatric Practice Questions Related

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In embryonic period, formation of all of the following occur by the given time EXCEPT

  • A. 8 days - blastocyst formation
  • B. 6 weeks - ectoderm formation
  • C. 8 weeks - crown-rump length about 3 cm
  • D. 10 weeks - endoderm formation
Correct Answer: D

Rationale: Endoderm formation occurs much earlier than 10 weeks in the embryonic period.