Fig. 8. Early pregnancy with findings suspicious for pregnancy failure.

Transabdominal ultrasonography in a 34-year-old woman with a positive beta-human chorionic gonadotropin test and vaginal bleeding demonstrates an intrauterine gestation with a mean sac diameter of 23 mm and a yolk sac diameter of 19 mm. No definite fetal pole was identified. Instead, an amorphous embryonic structure (arrowheads) was identified. These findings are suspicious for, but not diagnostic of pregnancy failure.