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Which of the following gestational ages and weights are typically used to define abortion?

a. Less than 12 weeks, less than 100 g

b. Less than 12 weeks, less than 250 g

c. Less than 16 weeks, less than 500 g

d. Less than 20 weeks, less than 500 g

Approximately what percentage of spontaneous miscarriages occur in the first 12 weeks of pregnancy?

a. 20%

b. 40%

c. 60%

d. 80%

Which of the following is the most common cause of first-trimester pregnancy loss?

a. Uterine anomalies

b. Incompetent cervix

c. Intrauterine infection

d. Fetal chromosomal abnormalities

Which of the following factors is least likely to be linked with higher first-trimester miscarriage rates?

a. Obesity

b. Diabetes mellitus

c. Parvovirus infection

d. Maternal age older than 40 years

A 24-year-old G3P0A2 presents with 8 weeks of amenorrhea and vaginal bleeding. Her serum beta human chorionic gonadotropin (β-hCG) level is 68,000 mIU/mL, and her internal cervical os is closed. The sonographic uterine findings are shown below, and fetal heart motion is noted. Normal adnexal anatomy is seen. Your diagnosis is which of the following?

Reproduced with permission from Werner CL, Moschos E, Griffith WF, et al (eds): Abortion. In Williams Gynecology, 2nd Edition Study Guide. New York, McGraw-Hill, 2012, Q6–10.

a. Missed abortion

b. Incomplete abortion

c. Threatened abortion

d. Inevitable abortion

Effective prevention of miscarriage in women with threatened abortion includes which of the following?

a. Bed rest


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