Ultrasound during pregnancy will not affect the fetus, and you can actively cooperate with the doctor to carry out obstetric examination. Ultrasound does not produce radiation, so it will not affect the development of the fetus. You can go to the hospital for regular checkups during pregnancy. The most common type of checkup is ultrasound, through which you can observe the development of the fetus at each stage, and learn about the amount of amniotic fluid, the placenta, the size of the fetus, and other aspects of the situation. In addition to ultrasound, blood tests, fetal heart monitoring and other methods of obstetric examination will not affect the development of the fetus, but it is important to go to a regular hospital for obstetric examination. Pregnant women are advised not to worry too much and not to stop going to the maternity checkups because of the checkup methods because regular maternity checkups are the earliest measure to know whether there are any abnormalities occurring in the fetus, which can avoid a lot of problems from occurring.