1, the importance of early detection of baby developmental abnormalities Children are the hope of the family, the future of the country, it is vital to cultivate a healthy and intelligent baby With the development of society, the living environment is gradually deteriorating, resulting in a significant increase in the number of factors that cause stunted children. It is very important to detect developmental problems in children at an early stage and to intervene at a very early stage. The number of neurons in a child’s brain is comparable to that of an adult after birth, and dendrites and axons are gradually developed and perfected in the first 3 months of life, and neural myelination is completed by the age of 3-4 years. In other words, if the abnormality is found before 3 months of age and timely intervention, it will receive twice the result with half the effort, while the effect of treatment will be reduced before 1 year of age, and the effect of treatment will be almost gone after 3 years of age. 2, the regularity of normal child growth and development 1) 24 hours after birth is very sensitive to sound, once there is the sound of firecrackers or the sound of closing doors, the child will shake the whole body, if not sensitive to sound, should be promptly checked. 2)They will eat milk after birth and are very sensitive to taste, if they eat milk poorly they should pay high attention. 3) Urination 12 hours after birth and defecation 24 hours after birth. 4) A full-term baby should have sucking reflex, feeding reflex, hugging reflex and holding reflex. If not, it should be taken seriously. As the baby grows older, he will raise his head at 3 months, recognize his mother at 4 months and can actively grasp objects and make laughing sounds, sit at 6 months, crawl at 8 months and call his parents, and walk and talk at 1 year. Head circumference: about 34cm at birth, 40cm at 3 months, 46cm at 1 year, 48cm at 2 years, 50cm at 5 years. 2) Weight: about 3000g at birth, twice as much at 3 months, 3 times as much at 1 year, 4 times as much at 2 years. 2 years later, weight is age multiplied by 2+8kg. 3) Height :50cm at birth, 62.5cm at 3 months, 75cm at 1 year, 87cm at 2 years. after 2 years is age multiplied by 7+75cm