Newborn growth dynamics

For the first year of life, a child's height increases by 24-25 cm, and by the year the length of his body reaches 74-75 cm.

In the first 3 months, the growth increases on average 3 cm per month, from 3 to 6 months - 2,5-2 cm, from 6 to 9 months - at 1.5 cm and in the last quarter of the first year - only 1 cm per month.

In the 2nd year, the growth rate is even lower: the child's growth for the 2nd year is about 10 cm, for the third year - 8-9 cm.

After 3 years and before the puberty, the average increase in the child's growth for the year is5-6 cm.

It is possible to roughly determine the average body length of a preschool and primary school child by the formula:

X = 75 cm + 5.5 x n ,

where n is the number of years.

Example. At 10 years of age, the average height of the child is 75 cm + 55 = 130 cm.

The initial growth of the newborn is doubled to 4-4.5 years and tripled at the age of puberty( 13-15 beds).

At the beginning of the period of puberty, growth is growing even faster, by the end of this period( by the age of 18 in girls, by the age of 25 in young men) growth is ending.

The growth of a child is measured using a rostomere. Up to a year, a horizontal growth meter is used;the child is placed on it so that the head is snug against the head end of the growth meter, where it is held by the mother or any of the personnel. The nurse straightens the legs of the child, lightly pressing on his knees, the moving part of the foot is brought under the plantar part of the foot, the level of which determines the growth of the child. From 1-1,5 years, when the child is firmly on the legs, you can use a vertical rostomer. In this case, the child must touch the measuring board with five points of his body: the back of the head, back, buttocks, calves and heels. The child's view must be directed forward. The movable bar of the growth gauge is lowered onto the head of the child and indicates its growth. In some cases, children are required to determine the growth of sitting. For this purpose, the child is placed on a flip-down board-seat, which is specially attached to the Rostomer, and determines the distance from this board to the level of the child's head. To determine the growth of sitting on a horizontal rostomere, the plank-engine is brought under the buttocks with the legs raised upward.