Is ultrasound during pregnancy harmful to the fetus?

Many pregnant mothers have questions: "Is ultrasound radiation? Does ultrasound do harm to the fetus?" Liu Dong, the chief physician of the ultrasound department of Beijing Friendship Hospital, said that pregnant mothers don't have to worry because the safety of ultrasound can be guaranteed. Warmly remind all pregnant mothers: health care during pregnancy, prenatal screening and regular prenatal check-ups to ensure the safety of mothers and babies!