One year and eight months of the baby does not speak is generally not normal, considered by physiological factors or pathological factors, should take timely measures. 1. Physiological factors: If the parents did not create a rich language communication environment for the baby, it may be difficult for the baby to learn to speak. In addition, because of individual developmental differences, some babies language center development is late, may also appear not to speak phenomenon. In this case, the baby should be guided more, without special treatment. 2. Pathological factors: If the baby has relevant disease factors such as hearing impairment, it is difficult to receive sound normally, which may also lead to failure to learn to speak. In addition, there are intellectual disabilities or autism babies, usually can not speak, this time should be diagnosed and receive timely treatment. Generally babies in 3 ~ 4 months can babble pronunciation, about one year old can say simple words, if one year and eight months of babies do not speak, it is recommended to seek medical attention to clarify the cause of the disease, according to the cause of the corresponding measures to avoid delays in treatment.