Ultrasound has radiation, but the level of radiation is very small, generally will not cause harm to the human body. Ultrasound is a non-invasive means of examination, can clearly check the human abdominal organs, the use of the process will produce a very small degree of electromagnetic radiation, generally will not cause any harm to the human body. Therefore, B ultrasound is widely used in clinics because of its high safety and strong operability, and can also be used by pregnant women, and generally does not cause harm to pregnant women and fetuses. On the other hand, X-ray, CT and other means of examination, the use of the process will produce strong ionizing radiation, may lead to DNA denaturation of cells in the body, which is very harmful to the human body. Pregnant women, in particular, are prohibited from using X-ray, CT and other instruments for examination during pregnancy. After the patient does ultrasound examination, if found abnormalities in the body, should go to the regular hospital in time, under the guidance of the doctor treatment, so as not to delay the condition.