Q22
Single choice
Select the ONE best lettered option that is the most likely diagnosis of vaginal bleeding in pregnancy. Each lettered option may be selected once, more than once, or not at all.
A21-year-old woman last menstruated 6 weeks ago. Her menses are usually every 2830 days. She has a past history of chlamydia. One week ago she had a positive home pregnancy test. She complains of mild left lower quadrant pain.
Quantitative serum chorionic gonadotropin (hCG) concentrations 2 days ago and today are 6850 and 7685 mIU/mL, respectively. No intrauterine pregnancy is identified by transvaginal ultrasound.