my 20-month-old boy has not started speaking words yet. he is only mummerinh Amma, akka, babba.. is it concern at this age?

A. No some kids pick up by the age of 18 months on speech which is completely fine now you should try and communicate more with your child because the more you communicate with your child the better your child is going to learn is a matter of time there is no deal in the speech as of now