Mid-pregnancy (4-6 months) oral health care: 1, strengthen oral hygiene: mid-pregnancy (4-6 months) is the most comfortable period for the mother-to-be. Without all the reactions of early pregnancy, the increasing changes in body shape is not enough to affect daily activities, gradually open appetite to ensure the nutritional needs of this stage, but do not neglect the oral hygiene ah, because how the oral hygiene at this time, not only affect your health, but also related to the health of the baby; 2, oral health examination: should seize this time the mother in a more stable period and then 3.Treat dental disease urgently: If you find that you have gingivitis, gum tumor, and untreated oral diseases such as dental caries, periodontitis, etc., you should seize this period for treatment.