Pregnancy is confirmed, but an ultrasound examination reveals an echogenic zone in the uterus, which may be due to a small gestational age, ectopic pregnancy, or abnormal fetal development. In this case, the pregnant woman needs to clarify the specific cause and then carry out targeted treatment. Common causes 1, the pregnancy week is too small: after pregnancy about 6 weeks ultrasound to see the pregnancy sac, so if the time of ultrasound examination is too early, usually the uterine cavity can not see the pregnancy sac, but only suggest that no echogenic area, this situation need not worry too much, with the development of the fetus, this situation can disappear. The earliest pregnant women can see the gestational sac in the uterine cavity during a transvaginal B examination 35 days after menopause, but if there is a delay in ovulation, the time to see the sac on ultrasound may be pushed back; 2. Ectopic pregnancy: in ectopic pregnancy, there is no gestational sac in the uterine cavity, but there may be blood accumulation, thus suggesting no echogenicity. If diagnosed, it can be treated with drugs such as methotrexate or laparoscopic surgery to terminate the pregnancy under the guidance of a professional doctor to prevent dangerous situations such as hemorrhage; 3. Abnormal fetal development: abnormal embryonic development, where the development does not coincide with the actual gestational week, may also result in a delay in seeing the typical fetal sac structure, with only an echogenic area, requiring relevant examination and active treatment. If the development is only slightly dysplastic, recovery can be promoted by means of enhanced nutrition. Note: If no gestational sac is found in the uterine cavity during the ultrasound examination after pregnancy, suggesting an echogenic zone, you can wait for another 1 week for ultrasound review and do not worry too much.