Many middle-aged women with severe periodontitis are seen clinically, and when asked, many are the result of not paying good attention to oral health care hygiene during pregnancy and gestation. And it is also important for mothers-to-be to know more about oral health for their future babies. In general, you need to know the oral health care knowledge during pregnancy include the following aspects: 1, oral health maintenance means. The main thing is the correct and effective method of brushing teeth and thorough protection of periodontal health. 2, regular oral health examination, early detection of oral diseases and timely treatment, focusing on the prevention of gingivitis during pregnancy. Oral examination should be done early before or after pregnancy, and any disease should be treated in time. Oral treatment in the first three months of pregnancy is generally only to deal with acute symptoms, at this time to avoid X-ray irradiation; 4 to 6 months of pregnancy is the appropriate period for the treatment of oral diseases, dental treatment is best completed in the next stage, but at this time, such as the use of X-rays, need to be used under protective measures (such as the use of lead clothing for the breast and pelvic cavity, etc.), do not irradiate the pelvis and abdomen; the second trimester of pregnancy should avoid general anesthesia, acute cases need to be treated Only local anesthesia should be used in case of emergency. Foreign surveys have reported that 36% to 100% of women during pregnancy suffer from gingivitis, which can gradually worsen if not treated. 3, establish good habits, use drugs carefully, such as Librium, Valium, phenytoin sodium, prednisone, cortisone, tetracycline, gentamicin, streptomycin, kanamycin and other drugs that are harmful to fetal development are avoided.