Hi Madam/Sir, He is unable to form sentences but able to speak few words(30 words). From past few months his words count is increasing but at very slow pace. He understands whatever we say and follows instructions. He points out the objects we say. Says few of the numbers. He likes to play and spend time with other children.His grandfather and father both had speech delay....Is speech delay hereditary? Whom should we consult for this issue?