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Questions and Answers
What percentage of pregnancies are estimated to end in spontaneous abortion?
What percentage of pregnancies are estimated to end in spontaneous abortion?
- 10%
- 75%
- 25%
- 50% (correct)
When are abnormal zygotes usually lost?
When are abnormal zygotes usually lost?
- 2 to 3 weeks of fertilization (correct)
- 4 to 6 weeks of fertilization
- 7 to 8 weeks of fertilization
- 1 to 2 weeks of fertilization
What proportion of pregnancy losses are a result of chromosomal abnormalities?
What proportion of pregnancy losses are a result of chromosomal abnormalities?
- Two-thirds
- One-third
- Half (correct)
- Three-quarters
Which condition is characterized by a partial deletion of the short arm of chromosome 5?
Which condition is characterized by a partial deletion of the short arm of chromosome 5?
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What is the approximate incidence of trisomy 18 in newborns?
What is the approximate incidence of trisomy 18 in newborns?
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Which abnormality is associated with a cat-like cry, microcephaly, and congenital heart disease?
Which abnormality is associated with a cat-like cry, microcephaly, and congenital heart disease?
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What percentage of trisomy 13 infants die within the first month after birth?
What percentage of trisomy 13 infants die within the first month after birth?
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What is a common feature observed in patients with trisomy 18?
What is a common feature observed in patients with trisomy 18?
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