Fetal loss following ultrasound diagnosis of a live fetus at 6–10 weeks of gestation

Abstract

In pregnancies with a live fetus at 6-10 weeks' gestation the rate of subsequent fetal loss is related to maternal age, gestation, cigarette smoking, history of vaginal bleeding and the ultrasound findings of small gestation sac diameter and fetal bradycardia, relative to crown-rump length.