Fillings can be done after the 6th month of pregnancy, but tooth extraction should wait until after delivery, otherwise it will have an impact on the baby. Tooth extraction is not a big deal for the general public (except for patients with serious cardiovascular diseases and blood disorders), but special attention should be paid to pregnant women. Because of the nervousness and painful stimulation during tooth extraction, the uterus may contract, which may cause miscarriage and premature delivery. According to clinical data, miscarriage can be induced by tooth extraction during the first 3 months of pregnancy; preterm labor can be induced by tooth extraction after 8 months of pregnancy; and tooth extraction during 4-7 months of pregnancy is relatively safe. In addition, due to the influence of estrogen, pregnant women tend to bleed excessively during tooth extraction, so tooth extraction should be avoided during pregnancy unless it is necessary. In conclusion, there are many disadvantages of tooth extraction during pregnancy, so if tooth extraction is necessary, it should be done after delivery. Before tooth extraction, you should get enough rest, sleep, take good oral care and relax your mind, and be fully anesthetized during tooth extraction to avoid uterine contractions caused by uterine stimulation that may induce miscarriage and preterm labor. Pregnant women with a history of habitual miscarriage and premature birth should refrain from tooth extraction. If you have oral diseases, it is best to actively treat them before pregnancy, as it would be more passive to deal with oral diseases once you are pregnant.