婴儿身高体重标准参考（Standard reference for height and weight of baby）.doc

婴儿身高体重标准参考（Standard reference for height and weight of baby） Weight, body length and head circumference are regarded as important indicators of infant development, and are essential for infants physical examination. Mothers can judge the babys situation by weight, body length and head circumference. Weight: the normal weight of the newly born child is 2.5 ~ 4.0 kg. Infant weight gain was the fastest in 3 months, about 750 ~ 900g per month. In the first six months, the average monthly gain is about 600g. The average monthly gain of 7 to 12 months is 500 g, and at 1 year old weight is about 3 times that of birth weight. Healthy baby weight no matter increase or decrease all should not exceed 10% of normal weight, obesity is more than 20%, below the average index of more than 15%, should consider to malnutrition or other reasons, must go to a hospital checking as soon as possible. Body length: the average length of the baby is 3 to 3.5 cm per month for the first 3 months of life. The average length of the baby is 2 cm for 4 ~ 6 months and 1 ~ 1.5 cm per month for 7 to 12 months. It was about half a length when I was 1. The fastest growing child in the age of 1, such as poor feeding and delay in growth, is not easy to catch up with the same age. Head circumference: within one year of life, it is the fastest growing period of the head in a lifetime. The way to measure the head circumference is to use plastic tape to make the protruding part of the back of the head from the back of the head to the upper part of the forehead. The first 6 months after the birth of children increased by 6 ~ 10cm and increased by 10 ~ 12cm at the age of 1. The growth of head circumference marks the development degree of brain and skull. Boys 0-3 years growth table (world health organization information) Month (year) age weight (kg) (mean) body length (cm) (mean) head circumference (cm) (average) Primary birth 2.5 ~ 4.2 (3.3) 46.2 ~ 54.8 (50.5) 31.9 ~ 36.7 (34.3) January 3.0 ~ 5.6 (4.3) 49.9 ~