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MCBM Exam 2 Fetal Period Questions with 100% Correct Answers
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MCBM Exam 2 Fetal Period Questions with 100% Correct Answers
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1 of 33Term
What is the difference between Dizygotic and Monozygotic twins?
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Dizygotic (fraternal)- two separate oocytes fertilized independently, two
separate fetuses
Monozygotic (identical)- 1 zygote or blastocyte divides, creates two
embryos with the same DNA sequence
, -contains amniotic fluid
-amniotic fluid arises from:
-placenta (early in development by diffusion through chorion)
- amniotic membrane
- embryonic urine
- guts and developing lung
-ultrasound
-amniocentisis
-chorionic villus sampling
-fetoscopy
-radiology
-maternal blood screening
It provides early nutrient transfer to the developing embryo, is the site of
formation of germinal cells
-earliest site of blood cell development
-first blood vessels appear here
*detaches at 6 weeks
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2 of 33
Term
What is fetoscopy and how is it used?
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-contains amniotic fluid
-amniotic fluid arises from:
-placenta (early in development by diffusion through chorion)
- amniotic membrane
, - embryonic urine
- guts and developing lung
pericardial, pleural, and peritoneal cavities
-arises from within lateral plate mesoderm
- initial horseshoe shape of early intra embryonic celom
Used in karyotyping or for biochemical tests
-low risk
-usually done 15-20 weeks
- collects sample of amniotic fluid and cells
Place endoscope in amnion to directly observe fetus, even perform
surgery if necessary
-specialized, useful in unusual circumstances or specialized circumstances
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3 of 33
Term
What is a cyst?
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abnormal fluid-containing
failure of organ to develop at all
structure
abnormal location of development abnormal connection
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