Patient's question:
Substantial changes in height growth are not increasing or slow. What kind of assistance do you care about: My son is 4 and a half years old, but his height is only 1 meter, and his weight is 28 pounds. I don't know how abnormal it is, and he is much shorter than his peers at school...Doctor's answer:
A child's height is not always proportional to their health status. Among children of the same age, those who are slightly shorter may not necessarily be less healthy than those who are taller. However, if a child's height is outside the normal range, it indicates that there may be some special circumstances affecting their growth and development. Parents should take their child to the hospital for a thorough examination to identify the cause.At birth, a child's length is approximately 50 cm. In the first three months after birth, their length increases by about 11–12 cm. By one year of age, they reach 75 cm, and by two years, they reach 85 cm. For children aged 2–12, their normal height can be estimated using the following formula:
- At 12 months: 75 cm + (age × 6) + 77 cm
- For ages 2–12: (age × 6) + 77 cm
Weight
According to the growth patterns of children, the rate of weight gain gradually slows and stabilizes as they age.
- Starting at one year, children gain about 150 grams per month.
- From age 2 to 7–8 years, they gain more than 1.6 kilograms per year, approximately 2 kilograms.
The weight of a normal child can also be estimated using the following formulas:
- 3–12 months: (age + 9) / 2
- 6–12 years: (age × 2) + 7 (or 8) kilograms
- 7–12 years: (age × 7 - 5) / 2
Height
Height is influenced by various factors, including heredity (intergenerational inheritance), nutrition, endocrine conditions, activity levels, and diseases. Significant height abnormalities are often caused by illnesses. If a child is simply growing slowly but shows no other discomforts, parents need not worry. However, if the child has other problems, parents should take them to the hospital for a follow-up examination to determine the cause.
Parents should measure their child's weight at least every three months. If the child's weight falls below the normal estimated value or does not increase over two months, it requires close attention. Immediate medical examination is necessary to identify the cause and provide appropriate treatment.