My brother's son is one year 1 month old but he has not grown a single tooth.So do some children get their teeth late, but why?

A. Okay so first of all it is not late let me tell you a child should have its first teeth between the age of three months to 17 months if you look at it there is no problem it will happen when it has to and if it does not by the time of 17 months then you please consult a dentist