Predictive value of presence of amniotic sac without visible embryonic heartbeat in diagnosis of early embryonic demise

Abstract

The finding on ultrasound of an amniotic sac without a live embryo (amniotic sac sign) is a reliable marker of early pregnancy failure and could reduce the number of follow-up scans by 11% in cases of diagnostic uncertainty. © 2020 International Society of Ultrasound in Obstetrics and Gynecology.