Under normal circumstances, milk teeth gradually begin to erupt 6-8 months after birth. Those who have not erupted after 13 months of life are delayed in the eruption of milk teeth, which is not normal. The growth of milk teeth has a certain relationship with the bones, and will be affected by a variety of factors such as genetics, endocrine, food properties, etc., the eruption of the order of time appears to be different. Most babies erupt their first milk teeth 6 to 8 months after birth, and all 20 milk teeth erupt by the age of 2.5 to 3 years. If there is still no eruption of milk teeth beyond 13 months, delayed eruption needs to be considered. During the period of eruption, it is important to ensure that the baby’s nutrition is balanced, with appropriate supplementation of protein, calcium, phosphorus and other trace elements, vitamins, etc., and to rule out calcium deficiency, hypothyroidism and other diseases if necessary. If your baby’s teeth are delayed, you need to take your baby to the hospital to find out the cause of the delay.