The finding of an echogenic zone of the gestational sac by ultrasound is not necessarily a clinical indication that the embryo has stopped developing. In early pregnancy, for example, at about 35 days of menopause, the case of an echogenic zone is when the gestational sac is seen in the uterus and often the yolk sac is not visible. In this case, the yolk sac is not yet visible because the pregnancy is relatively short. It is advisable to have an ultrasound examination after one week and to have blood HCG checked every other day at the same time to combine the blood HCG. If the blood HCG doubles every other day, it basically means that the embryo is developing well. After a week, the yolk sac can often be seen in the gestational sac by ultrasound. However, if the blood HCG does not double but drops, clinically it is possible that the embryo has stopped developing.