Eight-month-old babies still have no teeth is generally normal, mostly related to genetic factors, but also need to be vigilant about the lack of vitamin D, calcium deficiency and so on. Generally can be temporarily observed and followed up, if you consider vitamin D deficiency, you can follow the doctor’s instructions to be general treatment, medication and so on. 1. Genetic factors: may be the father or mother have late growth of teeth baby, there may be such a situation, temporarily do not need special treatment, observation and follow-up, but pay attention to timely review. 2. lack of vitamin D and calcium: if the baby lack of vitamin D or calcium deficiency may also affect the eruption of teeth, resulting in late eruption of teeth, to timely follow the doctor’s advice to the baby calcium supplements, can follow the doctor’s advice to supplement vitamin D and calcium gluconate, etc., and usually should also take the baby more sunshine. Eight months the baby has not yet teeth may be caused by other reasons, such as congenital ectodermal dysplasia, etc., if the persistence of the teeth, we should consult the doctor to find out the reason.