A parent asked me with a child's kindergarten health certificate, saying that the child's height was only 2 cm last semester (from summer vacation to winter vacation) and 4 cm next semester. Is this normal? I told him it was normal. After the age of 2, the child's height increases by about 5 cm every year, but the growth rate is different throughout the year. Spring is the season when everything grows, and our baby is growing rapidly in this vibrant season. Height is a very important indicator, which can best measure the baby's growth and development. What should parents do for their baby in order not to miss this annual golden period of development? Spring is the season when babies grow taller. According to a report of the World Health Organization, the growth rate of children is different in four seasons. The fastest growth is in May, with an average of 7.3mm, and the slowest growth is 10, with an average of 3.3 mm. So April and May are the best time for the baby to grow taller every year. The growth of height is regular. The baby's height increases regularly. The average length of a newborn is about 50 cm, and its height grows fastest in the first year after birth, about 25 cm. In the second year, the growth rate of height slowed down and increased by about10 cm a year; After two years old, the growth rate of height tends to be stable, with an average annual growth of 5-7 cm. Want to know the baby's future height? We recommend a formula for estimating the average height of children aged 2- 12: height (cm) = age ×7+70. Through this formula, parents can know the baby's future height. Of course, the above values are only general, and the height of different babies will be affected by gestational age, gender, maternal nutritional status, intrauterine development, heredity and other factors. The baby's height is an important indicator of children's bone development. The height of a baby is determined by the development of bones. Bones related to height include skull, spine and long bones of lower limbs. The growth rate of each part is different, the head grows fastest in the first year after birth, followed by the spine; Puberty, the fastest growth of lower limbs. The development of the skull The skull grows with the development of the brain. The development of skull can be measured by the size of head circumference, the closure of cranial suture and fontanel sooner or later. Medical tip: the fontanel is too small or closed prematurely at birth, indicating that the baby's brain development has problems; Excessive fontanel and delayed closure may also be pathological conditions, so you should consult a pediatrician for further examination. The development of the spine is in the first year after the baby is born, and the growth of the spine is faster than that of the limbs. The baby's movement development should adapt to the development of the spine, that is, the baby will look up in 2-3 months, sit alone in 6-7 months, climb in 8-9 months,10-10/month, and 12- 16 months. If you don't reach the corresponding age, don't learn to sit and stand too early, so as not to cause excessive curvature of the spine and affect your height. The development of long bones The long bone structure of limbs is divided into three parts: the diaphysis, the epiphysis and the metaphysis. During the whole growth and development of the baby, the bone grows at the epiphyseal ossification center and cartilage plate at both ends of the long bone, which gradually increases the length and height of the bone.

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