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First-Trimester Abortion

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More than 80 percent of spontaneous abortions occur in the first 12 weeks of pregnancy. What percent of these result from chromosomal anomalies?

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a. 25

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b. 35

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c. 50

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d. 75

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Although most early pregnancy losses are clinically silent, approximately what percentage of all pregnancies are reportedly lost after implantation?

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a. 11

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b. 21

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c. 31

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d. 41

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Which of the following chromosomal anomalies is most frequently identified with first-trimester abortion?

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a. Triploidy

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b. Monosomy X (45,X)

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c. Autosomal trisomy

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d. Balanced Robertsonian translocation

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Maternal factors that contribute to euploid abortion include all EXCEPT which of the following?

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a. Frequent alcohol use

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b. Daily tobacco smoking

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c. Dietary nutrient deficiency

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d. Poorly controlled diabetes mellitus

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Although moderate caffeine consumption is unlikely to cause spontaneous abortion, studies consistently warn that use above what daily amount of caffeine increases the risk for miscarriage?

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a. 200 mg (2 cups of coffee)

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b. 300 mg (3 cups of coffee)

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c. 400 mg (4 cups of coffee)

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d. 500 mg (5 cups of coffee)

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Up to what percentage of women experience vaginal spotting or bleeding during early gestation?

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a. 15

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b. 25

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c. 35

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d. 45

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Approximately what percentage of pregnancies abort in women experiencing early gestational bleeding?

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a. 5

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