Embryonic Development and Implantation

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Questions and Answers

What is the most common location for ectopic pregnancy to occur?

  • Uterine tube (correct)
  • Ovary
  • Cervix
  • Uterus

What is the consequence of blastocyst implantation close to the cervix?

  • Placenta previa (correct)
  • Severe hemorrhaging
  • Hydatidiform mole
  • Maternal blood fills lacunar spaces

What is hydatidiform mole?

  • A type of extraembryonic membrane
  • A clinical correlate related to abnormal implantation and pregnancy complications
  • A form of ectopic pregnancy
  • When the trophoblast forms placental membranes without embryonic tissue (correct)

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Study Notes

  1. Formation of amniotic cavity and extraembryonic membranes occur on day 13-14.
  2. Maternal blood fills lacunar spaces during this time.
  3. Human chorionic gonadotropin (hG) can be detected at the end of the second week for pregnancy testing.
  4. Normal blastocyst implants along the anterior or posterior wall of the uterus.
  5. Blastocyst implantation close to the cervix can cause placenta previa and severe bleeding.
  6. Ectopic pregnancy occurs outside the uterus, most commonly in the uterine tube.
  7. Most ectopic pregnancies result in embryo death and severe hemorrhaging.
  8. Hydatidiform mole can occur when the trophoblast forms placental membranes without embryonic tissue.
  9. Clinical correlates related to abnormal implantation and pregnancy complications.
  10. No clear context or explanation provided for "0 ET 017*".

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