It may be normal for a 1 year old baby to have no teeth yet, or it may be caused by hypothyroidism, vitamin D deficiency and so on.
1. Physiological reasons: generally infants in 4 ~ 10 months began to have milk teeth eruption, but milk teeth eruption time and order of the existence of large individual differences, such as with genetic, endocrine, food shape and so on. Generally speaking, it is still normal that the teeth have not erupted before 13 months, which may be caused by heredity or too soft and late addition of complementary foods.
2. Pathological reasons: if 13 months still no eruption of milk teeth for the delayed eruption of milk teeth, may be hypothyroidism, vitamin D deficiency or rickets, malnutrition, Down’s syndrome and other diseases.
If the age of 1 year old baby has not reached 13 months can continue to observe and wait, if the age of 13 months has reached the recommended timely consultation, follow the doctor’s instructions for examination and treatment.