Teething at 6-10 months is normal, and delayed tooth eruption can be diagnosed if teeth do not appear at 13 months. Each baby’s physical condition is different, so the time of teething is also different, about 6-10 months, there are some individual differences, if the baby grows teeth within this stage there is no need to be overly nervous. The growth and development of baby’s teeth is related to many factors, such as ectodermal dysplasia, malnutrition, genetic factors and so on. Usually need to pay more attention to the baby’s diet, if 13 months no teeth can be diagnosed with delayed tooth eruption, should be timely to the hospital stomatology department, under the guidance of the doctor to be targeted treatment.