Is color Doppler ultrasound harmful to the body?

Patient's question:

During pregnancy, it is always particularly uncomfortable, and morning sickness is also very severe. Please ask if a color ultrasound is harmful to the body.

Doctor's answer:

Ultrasound examination is currently considered to be one of the relatively safer examination items. Unlike X-ray or CT examinations, ultrasound does not involve exposure to radioactive substances, so it generally has no adverse effects on health, and there is no need to over worry. Generally, the early stage of pregnancy is a critical period for embryo development. During this time, it is important to avoid exposure to any factors that may have a negative impact on pregnancy.

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