I. Do not be overly anxious The commonly used developmental standard value is the average of the same age po. In order to facilitate the monitoring of the developmental status of children, to facilitate cross-sectional comparisons between children, and to facilitate the developmental changes of individual children at different ages, our textbooks, our health care assessments, and our clinical departments must use a simplified indicator, which is usually the average of most people in a given group. Appropriately, this is measured by a normal interval, which is described academically as “mean ± 1 standard deviation”, or in layman’s terms, “as long as it is within a certain range, it is normal, don’t worry about it”. Let me show you a chart, a very common “bell chart” in statistics: let’s take a practical example to illustrate: 1, according to the textbook theory of “2 lifts, 4 turns and 6 sits”, if your child happens to lift his head in the second month, his horizontal ability to lift his head is located in the Congratulations, your baby is a “textbook baby” and is perfectly in line with the developmental trajectory of head lifting described in the textbook. 2. If your baby raises his head at one and a half months, or at 2 and a half months, and his developmental level of head raising is approximately in the dark blue area, then don’t worry, your child is in the normal range (“mean ± 1 standard deviation”). Therefore, we should not be overly anxious because “other children can walk at 10 months and our child is still not walking at 12 months”, because comparison is unavoidable and necessary, but try to compare your child’s developmental level with the “normal range”, and compare your child’s developmental level with the “normal range”. But try to compare the child’s developmental level with the “normal range” and the developmental changes of the child at different ages, not with a particular individual. Don’t make a big deal out of all the problems. When developmental indicators are below the average for the child’s age, it is important to pay attention. Unlike some mothers who are overly anxious about a particular point in their child’s development, there are others who believe in the opposite principle: “There are individual differences in children’s development, so I would never compare my child to anyone else’s, and I don’t trust any doctor’s advice, they are all sensational.” This is actually an incorrect extreme as well. For example: When I worked at a children’s hospital in China, I would always see children with autism (also commonly known as autism) every now and then. What was very most distressing to me was that many of the children who came in for visits and evaluations were already 3 years old or older, and they were very behind or basically non-verbal in their language development and severely behind in their interpersonal communication willingness and skills. After being diagnosed with autism, I usually also ask one more question: Why didn’t you come to see them earlier? The answer from the family is: “I think he is just late in speaking, but there is nothing else wrong with him, he will get better on his own”, “I thought the child is just introverted, that’s the way his personality is” So, it is not easy to be a parent! Neither can you be overly anxious, comparing every item of your child’s development with a specific value (depending on the reference range), or using a certain “other child” as a reference indicator, nor can you go to the other extreme and “make a big deal out of” all the small worries of your child’s growth process “This is something I have experienced myself. If there are indicators below the normal range, or below the lowest value of the normal range, what should be done? I have to consider: should I take her for a health check? Is there any reason? What adjustments and efforts can be made? Some parents may ask, “How do we know what the normal “range” is? Two ways: 1. Consult a professional specialist. Be a learning parent and look for authoritative parenting books and guidelines. It is not advisable to judge your child or implement a parenting plan immediately after hearing only scattered parenting knowledge or scattered parenting advice found online.