Many mothers are very concerned about their baby’s teething status, and are anxious to see that their baby is late in getting teeth when babies of the same age have already grown. Because teeth are part of the human skeleton, many mothers think that late teething is a sign of calcium deficiency. So, what is the reason for your baby’s late teething? What can mothers do about it? So, what are the reasons for the difference in the time of baby teeth eruption? A. Physical reasons A baby with a good constitution will have a good spleen and stomach function, and will be more able to absorb the various nutrients required for dental development, as all parts of the teeth are highly calcified substances, and the calcification of teeth requires many nutrients, including calcium, phosphorus, vitamin D and fluorine, etc. As long as one of these nutrients is missing, it will cause obstacles to dental development. Calcium, which is very important to mothers, is indeed one of the most important nutrients. The development and growth of teeth is a long-term and complex process, not just 4-10 months of life as we think. We divide the development of teeth into three periods: growth, calcification and eruption. The baby’s milk teeth have already started to develop and calcify while the baby is in the mother’s womb. A normal child is born with two-thirds of the crowns of the milk teeth already formed and with varying degrees of calcification, only the eruption is not completed. Therefore, the shorter the gestational age, the later the baby’s teething time will be. The baby’s teeth will be further calcified after birth, so the growth of teeth cannot be achieved without sufficient calcium. If your baby is late in teething, accompanied by a thin body, sweating, sleep disorders, hair thinning, crying and so on, this is the obvious performance of calcium deficiency, you can go to the hospital for examination to further confirm the diagnosis, under the guidance of physicians appropriate calcium supplementation. Genetic reasons: Late teething and underdeveloped enamel of the baby’s milk teeth may also be due to the obstacle in the development of teeth during the embryonic period. The nutritional intake of the pregnant mother and the supplementation of calcium and vitamin D play a great role in the development of the baby’s teeth, and in some cases it is the lack of nutrition of the pregnant mother that causes the late teething of the baby. Some diseases, such as pituitary insufficiency, hypothyroidism, Down’s syndrome, are not only accompanied by the problem of delayed growth of all teeth, but also other systemic diseases, which are easier to distinguish. Some babies are born without dental buds, which leads to dental growth disorders. From the above list of common reasons for the late teething of babies, we can see that there are many factors related to the late teething of babies, and the slow growth of teeth due to malnutrition and calcium deficiency after birth is one of the important factors. Therefore, mothers should pay attention to the overall intake of baby’s nutrition and supplement the right amount of calcium and vitamin D to prevent late teething due to malnutrition and calcium deficiency.