Common oral diseases of pregnant women include dental caries, gingivitis, etc. If pregnant women have oral diseases, it will bring many adverse effects on fetal development, and there will be the following phenomena: 1, growth and development are limited: pregnant women need to take in enough nutrition to ensure the normal development of the fetus. But the presence of oral diseases often make pregnant women irritable, plus dental disease affects the full chewing of food, preventing the digestion and absorption of food, directly affecting the supply of nutrients to the fetus, which will make the fetal growth and development will be affected. 2, affect the development of fetal teeth: people generally believe that the baby’s teeth are 6 months after birth before they start to grow, in fact, the development of the dental embryo as early as 7-8 weeks of age in the embryo In fact, the development of dental embryos starts as early as 7-8 weeks of age. If pregnant women suffer from oral diseases, it will affect the intake of various nutrients, including vitamins A, C, D and calcium, phosphorus and other minerals needed in the development of the fetal dental embryo, thus preventing the normal formation and calcification of the fetal dental embryo, directly affecting the healthy development of the fetal teeth after birth. 3, prone to miscarriage and premature birth: some pregnant women often suffer from pain caused by moderate or severe dental disease and produce Mental tension, which will not only damage the health of pregnant women themselves, but also in the early and late pregnancy will cause miscarriage and premature delivery, and even fetal malformation, because the safe period of oral treatment for pregnant women is very short, only 4 to 6 months after pregnancy (the first 3 months of pregnancy is easy to induce miscarriage, the last 3 months of pregnancy is easy to cause premature delivery), women who are ready to conceive should go to the regular hospital dental specialist before conception for a Comprehensive oral examination and oral health care treatment before conception. Pre-pregnancy oral health care includes: treatment of decayed teeth, treatment of periodontal disease, cleaning of teeth. 1. extraction of teeth that cannot be retained, residual roots and crowns, and repeatedly inflamed blocked teeth (tight-rooted teeth). 2. removal of poorly restored dentures and restoration. 3. comprehensive restoration of missing teeth to restore chewing function. 4. during pregnancy, you should insist on brushing your teeth carefully and effectively in the morning and evening, brushing for 3-5 minutes each time, rinsing your mouth after meals, and Learn to use dental floss regularly to clean the adjacent surface of teeth. 4.Brush teeth with a small head and soft hair health care toothbrush, replace it once every 3 months, toothpaste with fluoride or bacterial inhibiting effect is appropriate, favorable to the prevention of caries. 5.Usually do the percussion exercise and massage gums regularly, do oral health examination regularly, it is recommended to go for examination once every 3 months, if you feel that you have oral diseases, you should consult the doctor at any time to Timely treatment, oral disease treatment is best within the safe period (4-6 months of pregnancy).