"Some suggest that if the beta-hCG level is >1800 mIU/mL (second international standard) a transabdominal ultrasound should be able to identify an intrauterine gestational sac; however, this value is debatable, and beta-hCG levels >2000 (or even >3000) without a visualised intrauterine gestational sac does not rule out an intrauterine pregnancy 4. Treatment for a suspected failed pregnancy should not be initiated on a hemodynamically stable woman on the basis of a single beta-hCG level 5."