Generally speaking, growth retardation, there will be a variety of abnormal manifestations, early careful observation, it is possible to early detection, to facilitate early diagnosis intervention treatment. If a baby within three years of age shows the following abnormal performance, mothers and fathers should pay high attention to the possibility that the child may have developmental delay. 1, for example, the child nine months, still can not reach for something, there may be problems such as motor development backward; 2, if the child cry has obvious abnormalities, such as eyes straight stare, drowsiness, irritability, fever convulsions, etc., there may be abnormal development of the nervous system. 3, there are also, for example, the child sucking power is poor, turn the head difficult, the head can not be erected, especially full 100 days, but still can not lift the head, it may be the case of motor development retardation. 4.If the child has a sluggish expression, does not smile easily, has a wide eye spacing, a flat nose, and a tongue sticking out of the mouth, be alert to the possibility of mental retardation. 5.If the child is nine months old and still can’t imitate adult speech, it may be a sign of backward language development. 6, if the child, the lack of interest in the surrounding people and environment, do not like to communicate with people, lack of emotional dependence, it may be the possibility of mental and emotional developmental delay, parents should care more about the baby, more talk with the baby, and pay attention to the possibility of the child has autism and other behavioral developmental abnormalities. 7, if the child’s height and weight are significantly behind the normal level, it may be a sign of growth retardation, to be treated early intervention. If your child has an abnormality in one of the above areas and is lagging behind compared to other babies around you, you should go to the pediatric clinic in a timely manner for evaluation to determine if your child is lagging behind in development so that early intervention can be made to improve the prognosis.