The presence of a yolk sac without fetal heart and buds may be a normal manifestation of an early examination or an abnormal manifestation caused by embryonic arrest. 1. Normal performance: if the pregnancy time is relatively short, the yolk sac may appear in the uterine cavity, but the fetal heart and buds have not yet developed, in the examination, there will be a yolk sac, but no fetal heart and buds development phenomenon, which may belong to the normal physiological phenomenon. After a week or so of re-examination, most of them can see fetal heart and buds development. 2. Abnormal performance: if pregnant women in more than 8 weeks of pregnancy, have not yet seen the fetal heart, fetal buds development, most of the embryonic failure caused by pathological manifestations. After the diagnosis is confirmed, it may be necessary to carry out clearance treatment. Therefore, if there is a yolk sac and no fetal heart and buds are seen, appropriate treatment is needed under the guidance of a professional obstetrician and gynecologist.