The length of the fetus in the belly at 11 weeks is about 8cm, at this time there is already a fetal heart and buds, and the top hip length is about 6cm. At 11 weeks, the fetus is still in the early stage of pregnancy, at this time the fetus does not have fetal movement, but there is already a fetal heart and buds, and the range of the fetal heartbeat is 120~160 beats per minute. At this time, the uterus is still in the pelvis, and the pregnancy cannot be seen from the abdomen. The total length of the fetus is about 8 cm and the vertex-hip length is about 6 cm, which makes it ready for Down syndrome screening. When the fetus is 11 weeks, it is recommended that the pregnant woman go to the hospital in time for a pregnancy checkup to determine the status of fetal development. Generally speaking, ultrasound is clearer, and the pregnant woman can clarify the specific situation of the child with the help of the doctor.