Patient's question:
Substantial growth stagnation or slow growth. What kind of assistance is needed: My son is 4 and a half years old, but he is only 1 meter tall and weighs 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 does not necessarily correlate with their health status. Among children of the same age, those who are 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 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
- From 2 to 12 years: (age × 6) + 77 cm
Weight: According to the growth patterns of children, as they age, the rate at which their weight increases gradually slows and stabilizes.
- Starting at one year of age, a child's weight increases by approximately 150 grams per month.
- From age 2 to 7–8 years, their weight increases by more than 1.6 kilograms per year, roughly 2 kilograms.
Normal weight for children 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 is influenced by various factors such as 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 is below the normal estimated value or does not increase over two months, it requires close attention. Parents should immediately take their child to the hospital for a thorough examination to identify the cause and provide appropriate treatment.