Empty sac is the most serious of the fetal termination of this statement does not exist, empty sac is one of the results of fetal termination. There is a difference between an empty sac and fetal termination, an empty sac is seen from ultrasound imaging to see an empty sac in the early embryo, there is no development of fetal buds, fetal heart, belongs to a kind of fetal termination, is also a more serious consequences, certainly can not be a normal pregnancy to continue, if necessary, need to be cleared for treatment. Fetal termination may be an empty sac, or the gestational sac has already appeared to have fetal buds, fetal heart, but during pregnancy due to the influence of internal or external factors, the embryo stops developing, this kind of is not just an empty sac, but there is a gestational material in the inside, but no matter what kind is not able to continue the pregnancy. Whether the pregnancy is empty sac or fetal arrest, it is not possible to continue the pregnancy, and should go to the hospital in time to deal with it.