The birth and growth of a healthy baby is the expectation of every family, so the mother-to-be is seriously well prepared from the beginning of her pregnancy in order to protect the health of her future baby. A must in the preparation stage is to have a comprehensive oral examination. Based on the examination results, the doctor will provide a targeted oral health care guidance program and develop a corresponding oral health care plan. It is recommended to have a comprehensive examination about six months in advance, focusing on caries, periodontal disease, and obstructed wisdom teeth. It is best to take a full-mouth X-ray to ensure that hidden lesions can be detected. Don’t worry about the dental x-ray, its radiation level is very low and does not affect the preparation for pregnancy. The mother-to-be can effectively reduce or even avoid developing oral diseases during pregnancy by doing a good pre-pregnancy oral examination and receiving the appropriate oral treatment as recommended by the doctor.