The large yolk sac is considered to be an abnormal embryo development, you need to go to the hospital regularly for ultrasound examination to see the embryo development, if the embryo development is abnormal, embryonic abortion, etc. you need to go to the hospital for abortion in time to avoid the aborted embryo to stay in the uterus for too long. This can lead to bleeding and abdominal pain, and can also cause intrauterine infection. If the fetus develops normally through ultrasound and there is no abortion, the pregnancy can be continued. It is also recommended that during the pregnancy, the diet should be strengthened and no drugs should be taken indiscriminately, and no exposure to radiation, such as X-rays, which can cause a large yolk sac. In addition, it is recommended to undergo Down’s syndrome screening during the 16-20 weeks of pregnancy, and also need to do 4D ultrasound examination in about 6 months of pregnancy, through the pregnancy maternity examination fetal development is normal, which is not to worry, it is recommended to relax during pregnancy, do not give yourself too much pressure.