There is no research to show that doing too much ultrasound during pregnancy will have an effect on the fetus. Ultrasound is ultrasound conduction, which is only a kind of sound wave conduction, not ionizing radiation or electromagnetic radiation, and it will not have an effect on the fetus. Color ultrasound plays a very important role in the examination during pregnancy. By doing color ultrasound, you can know the size and position of the fetus, as well as the growth and development of the fetus, the condition of amniotic fluid, and the function of the placenta. Color ultrasound uses ultrasound, which is not radioactive or physically harmful, and only uses ultrasound imaging to make judgments about the structure and shape of the human body, so it is relatively safe. Color ultrasound has no effect on the fetus, so pregnant women can rest assured that they will have effective and necessary ultrasound examinations during pregnancy under the guidance of their doctors.