Pregnancy consists of three trimesters. The first trimester of pregnancy are the first three months, the interval between 3 and 6 months is the second trimester, and the last three months are the third trimester. In the first trimester of pregnancy, which is the organ development stage of the baby, an effective dental treatment should be avoided. Treatment should be postponed to the second trimester of pregnancy. This is the best time for treatment. (4,5 and 6 months of pregnancy) The first and last trimester of pregnancy are sensitive periods. Non-emergency dental treatments should be left until after birth. It should be considered that the infection in the case of tooth and gingivitis will affect the health of the baby more than the negative effects of dental treatment