The effect of noise on the fetus depends on the intensity of the noise and the duration of the pregnant woman’s exposure to the noise. High-intensity and prolonged noise affects the hearing and growth of the fetus. Low-intensity, short-duration noise can be blocked by the abdominal wall, abdominal organs and amniotic fluid of the pregnant woman, thus reducing the direct effects of noise on the fetus. High-intensity and prolonged noise will directly affect the hearing of the fetus in the womb of the pregnant woman, which may lead to tinnitus in severe cases, and also indirectly affect the growth and development of the fetus by affecting the functions of the mother’s body, and in severe cases, may even cause fetal malformation. It is recommended to raise the fetus in a relatively quiet environment while pregnant and avoid noise as much as possible. In conclusion, the higher the noise intensity and the longer the exposure time of the pregnant woman will affect the hearing and growth of the fetus.