Phonological delay is a condition that occurs in children where speech development is slow for her age. It is usually diagnosed in the following cases: if you can not pronounce simple words clearly before 15 months if it is not able to express basic sentences arrived three years, or if you can not explain a fact or brief history of the four five. Generally, phonological delay is often taken for causes such as global developmental delay, mental retardation, hearing difficulties cause recognition errors of some phonemes, autism, or other disorders both mental and social, as in the case of children with problems in their familiar surroundings. Depending on the root cause of the phonological delay, a personalized treatment that may require the help of a speech therapist, psychologist or other health professional is required.