Early pregnancy is one of the most exciting- and nerve-wracking- times for a new mother. Amidst the joy of expecting a new baby are usually worries about whether the pregnancy is healthy and normal. Early pregnancy loss occurs when there is an intrauterine pregnancy either with no embryo or with an embryo without a heartbeat, before 13 weeks. Early pregnancy loss occurs in 15% of clinically recognized pregnancies. Doctors can use levels of the pregnancy hormone hCG and ultrasound to assist in this diagnosis. But how certain is the diagnosis of a healthy versus nonviable early pregnancy? How can we be sure that we do not misdiagnose a viable pregnancy as an early pregnancy loss and intervene inappropriately? Read on to learn about the new ultrasound guidelines meant to increase certainty in diagnosing early pregnancy loss.