Under normal circumstances, ultrasound during pregnancy is a common means of clinical examination for women doing maternity checkups, and doing ultrasound does not cause harm to the fetus, mainly because of the following reasons: 1. The number of ultrasound during pregnancy is not particularly high, so it is less likely to cause harm to the fetus. 3. At present, there is no clinical medical report that ultrasound during pregnancy can cause harm to the fetus. The above-mentioned aspects of pregnant women can be assured that they can have ultrasound during pregnancy, which will not bring adverse harm to the fetus in the abdomen and will not result in slow growth or developmental malformation of the fetus.