What is the height standard for children?

Parents should be very concerned about their children's height. They worry that their children will grow too short and look ugly in the future, so they will keep giving them nourishment as they grow. In fact, proper nourishment can indeed help children grow taller, but not too much. So what does the height standard of children depend on?

1. Male height = height at birth (cm) ÷ 0.2949; Female height = height at birth (cm) ÷ 0.3109. Please note when using this formula: it is only applicable to normal full-term newborns; if the height data can be measured with an accuracy of 0.1 cm, the height prediction will be more accurate.

2. Male height = height at 3 years old × 0.545 + average height of parents × 0.544 + 37.69 (cm); Female height = height at 3 years old × 0.545 + average height of parents × 0.544 + 25.63 (cm), standard height prediction formula (genetic law)

Male height = (father's height + mother's height) × 1.08 ÷ 2 (cm)

Female height = (father's height x 0.923 + mother's height) ÷ 2 (cm)

The above formula generally conforms to the genetic principle of "tall plus tall produces tall, tall plus dwarf produces tall, dwarf plus dwarf produces short".

(1) Height is related to the early or late stage of sexual maturity

The sooner or later of mature age will affect the rapid growth of height. Generally speaking, people who experience rapid growth earlier will reach the end point faster; those who experience it later will also reach the end point later. While girls with precocious puberty are no longer growing taller, girls with late puberty are still growing taller. Therefore, the rate of late sexual maturity in young girls is higher. The fastest growth period in height is during early adolescence. A girl's height can increase by 7 to 8 cm in the year before her first menstruation; while a boy's peak height growth period is the first year of puberty, around 13 to 14 years old, when his height can increase by 10 to 12 cm.

(2) Height is related to nutrition

In a sense, height is "built up" of nutrients (especially protein). There are 50,000 to 100,000 substances that make up the proteins in the human body, and the eight essential amino acids that make up these proteins must be supplied by food. If food can provide sufficient amounts of the eight essential amino acids, it can accelerate protein synthesis and help the growth and development of tissues and organs throughout the body, especially the growth and development of bones and skeletal cartilage. Experiments on preschool children showed that the experimental group that added 0.5 grams of lysine to each meal of bread was significantly taller and heavier than other children. Japan conducted an experiment on 6 pairs of twin babies, dividing them into two groups. The first group was given normal nutrition, while the second group had lysine added to their food. After 1,300 days, the babies in the second group were an average of 1.7 cm taller and 1 kg heavier than those in the first group. It can be seen that comprehensive and reasonable nutrition is a factor that affects height, and it is also a necessary condition for remedying height. The metabolism of bones, especially the lower limbs and spine, is most active during sexual development, which requires a rich supply of nutrients. High-protein in the diet, especially animal protein and inorganic salt foods such as calcium, phosphorus, and vitamins, such as lean meat, eggs, milk, fish, and various B and E vitamins that promote metabolism, nutrients contained in beans, whole grains, fresh fruits and vegetables, all contribute to the full development of bones, that is, the growth, thickening, widening of bones and the thickening of the bone cortex.

(3) Height is related to sleep

When biologists studied the secretion patterns of endocrine glands, they found that for children and teenagers, the better they sleep, the taller they will grow. The growth of height depends on the continuous growth of the epiphysis, and the growth of the epiphysis is controlled by the endocrine glands. The endocrine hormones that control height mainly include growth hormone, luteinizing hormone and sex hormones secreted by the pituitary gland, among which growth hormone has the most significant effect. The secretion of growth hormone has its obvious regularity, that is, it is secreted less during the day and more at night when sleeping. Researchers have found that after children fall into deep sleep for one hour, the secretion of growth hormone is 5 to 7 times higher than that during the day, and the secretion of sex hormones and luteinizing hormone is also very active during deep sleep. Obviously, this is very beneficial to children's height growth. Adolescence is the period when growth hormone and androgen secretion are most active. The main function of growth hormone is to grow the bones of the limbs; while androgen makes the bones thicker and stronger. The secretion of these two hormones is particularly strong during sleep, so teenagers must ensure adequate sleep, at least 8 hours a night.

(4) Height is related to genetics

According to research, 75% of a person's final height is determined by genetic factors. That is to say, in general, if parents are tall, their children will also be tall; if parents are short, their children will also be short. However, parents' height is not the only factor affecting their children's height. The impact of external factors, namely environmental conditions, on height cannot be ignored. External factors mainly refer to nutrition, living habits, physical exercise, etc.

The above is a detailed explanation of what the children’s height standards are related to. I believe that all parents have understood it, so be sure to ensure that your children have a normal sleep time every day, avoid staying up late, and don’t put too much pressure on them.