33 months baby will not speak, may be education, personality and other physiological factors, but also may be hearing impairment, intellectual developmental disorders and other pathological factors. 1. Physiological factors: Some babies are brought up by their grandparents and usually have fewer opportunities to speak and exercise, or babies are naturally more introverted, which can lead to a later time to speak. 2. Hearing impairment: Congenital hearing impairment is often accompanied by severe backwardness in language development. Since the child cannot hear, there is no way to learn language. 3. Abnormal intellectual development: Language requires the coordinated functioning of multiple organs such as the ear, brain and mouth. When the child’s intellectual development is abnormal, it may lead to 33 months baby can not speak. If your 33-month-old baby can’t speak, it may be caused by other factors such as autism, so we recommend that you actively seek medical attention to find the cause and, if necessary, cooperate with your doctor to carry out treatment.