After pregnancy, due to endocrine changes may lead to dilated blood vessels in the gums and weakened resistance. The alveolar bone will also be osteoporotic as a result. Pregnant women should maintain good oral hygiene, otherwise their teeth will feel uncomfortable, so they should be aware of comprehensive dental care. First of all, it is important to maintain adequate nutrition. Pregnant women are generally prone to picky eating, resulting in unbalanced nutritional intake after partial eating, certain nutrients needed by the organism cannot be guaranteed, and thus resistance is reduced. Under normal circumstances, there are bacteria in the human mouth, and when the body’s resistance decreases, these bacteria will be flooded. For example, under normal circumstances, there is a kind of Streptococcus pyogenes in the mouth, which is a kind of bacteria that specifically causes tooth decay. When the body’s resistance decreases, the ability of enzymes and trace elements in saliva to fight against this bacteria decreases, which easily causes tooth decay. So in order to have good teeth, a balanced diet and adequate nutrition is a very crucial part. Second, to maintain good oral hygiene . Oral hygiene during pregnancy should be done better than usual. Because pregnancy consumes a lot of food in a day, if you don’t clean out the food residue in time, the chance of tooth decay will be greatly increased. So in addition to the normal three times a day brushing, it is better to brush or rinse your teeth after every time you eat. Thirdly, you should take adequate calcium and fluoride. If you are prone to calcium deficiency during pregnancy, not only your own teeth will be harmed, but also the teeth of your fetus. While taking calcium supplements, pregnant women may want to take more walks outdoors to exercise and get vitamin D from the sun to participate in the synthesis of calcium in the body. In addition, in addition to using fluoride toothpaste every day, you can also take fluoride tablets orally under the guidance of your doctor and eat fluoride-containing foods, such as sea fish and tea with high fluoride content. Fourth, after suffering from dental disease, you should choose the right time to get timely and correct treatment. Normal people have their teeth examined once every six months. Pregnant women should have an oral examination once every three months. Because the early pregnancy fetal organ differentiation, easy to be affected by anti-inflammatory drugs, anesthetics; end of pregnancy, the uterus is more sensitive, easy to be stimulated by external contractions, resulting in premature delivery. Therefore, those who have oral disease should be treated during the fetus 3 months to 6 months.