Children's genetic factors, external environmental factors and acquired dietary factors will lead to these differences.
However, there is a common standard table. Generally speaking, a child should be about 2.5~4 kg at birth, and the child's body length is about 50 cm. In the first month, the child can grow 25 cm tall. At this time, his weight can increase by about 180~200 grams per week. As time goes on, the child's weight and height, as well as his development speed, will gradually begin to decline.