Children's growth and development are characterized by continuous and phased growth. The first peak of growth is in infancy. The length and weight increase rapidly in the first year after birth, and the height can increase by 25cm; the second year increases by 10-11cm. Adolescence is the second peak of growth and development, and height and weight will increase rapidly.
What factors affect children's height?
- Genetic factors—70-75%
- Acquired factors—20-25%
Nutritional factors
Disease factors
Living environment
Social factors
Social factors
What is a child short? How to determine whether a child is short ?
In the case of similar living environments, individuals of the same race, same gender and age are 2 standard deviations (-2 SD) or lower than the average height of the normal population or lower than the 3rd percentile (-1.88 SD).
What misunderstandings should parents avoid about being short?
1. Our children grow up late and it’s okay.
There are morning and evening growth. If the average height of a child and his peers is 2-3cm apart, it is still possible to catch up with him if he grows a little later; But if the difference is more than 5cm or even 10cm apart, he may not catch up with his normal height even if he grows late.
The "late growth" here refers to delayed development during puberty. Boys did not see testicle volume greater than 4ml at the age of 14; girls did not see breast development at the age of 13, or did not have menstruation at the age of 16.
2. The boy did not change his voice, the girl did not have menstruation, it was not yet time, it was okay.
Voice changes and menstruation are signs that children enter the late stage of puberty. At this time, the epiphysis is almost closed and the height is about to stop and continue to grow.
The sign of the beginning of adolescence is that the breasts of girls and testicles of boys begin to develop. Children with normal development of bone age and age are equal, plus or minus no more than 1 year old.
3. Our children are picky in food and don’t like exercise, so they just need to strengthen their nutrition.
Many parents think that their children don’t grow up because they eat less and lack nutrition, so they will try to let their children eat more.
html After the age of 13, the key factor that determines the growth of children is not nutrition, but growth hormone . Children's height growth mainly depends on the secretion of growth hormone. Too little growth hormone secretion will cause slow growth.
Growth hormone is usually secreted when blood sugar is low. A normal person usually has a lower blood sugar level when he is hungry. means that when people are hungry, the growth hormone will be secreted more.
