If the sound of loud firecrackers does not frighten the pregnant woman and is far away, it generally has no effect on the fetus. However, if the pregnant woman is frightened, it may easily affect the fetus, such as abnormal fetal movement and miscarriage. To determine whether loud firecrackers have any effect on the fetus, it is necessary to depend on the actual situation and cannot be generalized. If the pregnant woman is far away from the loud firecrackers and she is not frightened, the fetus will not be affected under normal circumstances. However, if the sound of loud firecrackers causes the pregnant woman to be obviously frightened and causes frequent contractions, it may affect the fetus to a certain extent. The fetus will have abnormal fetal movement, which may cause miscarriage if the pregnant woman is in the early stage of pregnancy, and may cause intrauterine hypoxia if the pregnant woman is in the middle or late stage of pregnancy. It is recommended that pregnant women stay away from noisy environments, pay more attention to rest, balanced nutrition, and avoid overwork. All in all, when pregnant women experience discomfort, they need to go to the hospital in time to avoid adverse effects.