9 months baby will not call mom and dad, if it is physiological factors caused by the general do not need special treatment, give positive guidance can be; if it is caused by pathological factors, such as language center developmental disorders, hearing disorders, etc., need to consult a doctor in a timely manner, according to the specific cause of the disease to give the symptomatic treatment prescribed by the doctor. 1. Physiological factors: the development of the baby’s language center may be early or late, determined by individual development characteristics. So 9 months baby will not call mom and dad may be a normal physiological phenomenon, parents do not worry too much, can be appropriate to give the right guidance, more communication with the baby, teach the baby to gradually pronounce the words called mom and dad. 2. Pathological factors: such as due to the baby language center developmental disorders, it is recommended to go to the hospital for a clear diagnosis, the early implementation of systematic treatment, such as continuous language training, comprehension training, etc.; due to hearing disorders, the parents should bring the baby for examination in a timely manner, according to the specific cause of the symptomatic treatment, the earlier the intervention the better the results. Parents are advised to closely observe the development of their babies and seek medical attention as soon as possible for symptomatic adjustment or treatment of any abnormalities.