It is not recommended to fill teeth during pregnancy because the process of filling teeth will be painful, and if the pain is severe and nervous during pregnancy, it will affect the healthy development of the fetus, especially in the early stages of pregnancy if the nervousness will easily lead to uterine contractions and increase the chances of miscarriage. During the filling process, bleeding or inflammatory infection may occur, and anti-inflammatory drugs may be required if necessary, which may have an impact on the development of the fetus. Therefore, you should pay attention to hygiene during pregnancy, pay attention to cleaning teeth, pay attention not to eat spicy and stimulating food to avoid fire, and not to eat too hard food to avoid hurting the bad caries and aggravating toothache, and try to repair teeth after giving birth to the baby.