Spring is the prime time of the year for children to grow taller. According to a study conducted by the World Health Organization, children grow fastest in spring, with the height increase from March to May equaling 2 to 2.5 times the height increase from September to November. Are parents concerned about whether their children’s height is normal? Let’s talk to parents about children’s growth and development. Growth and development can be roughly divided into three stages Infant and toddler period (under the age of 3 years, and rapid growth period): birth to 3 years old, is the child’s rapid growth period, the first year of life, the fastest growth rate, can grow 25CM. the second year of the growth rate of 10CM. the main thing in this period is the state of nutrition and the regulation of the growth hormone. Childhood (3 years old – puberty, and stable growth period): from the age of 3 years old to the beginning of puberty (girls 10 years old, boys 12 years old), during this period of growth is mainly regulated by growth hormone and thyroxine, growth of 5-7CM per year. Puberty (accelerated growth period): after puberty, due to the rise in the level of sex hormones, the growth of children is accelerated again. Growth accelerates again after puberty due to increased levels of sex hormones, with growth hormone and sex hormones working together to promote growth, as well as sexual maturation and epiphyseal closure, which ultimately leads to a cessation of height growth. Throughout puberty, girls can increase their height by 20-25 CM, and boys begin puberty 2 years later than girls, so boys can gain an additional 8-10 CM in height. Mom’s tip: If your child’s height is lower than this standard, parents should pay attention and monitor your child’s annual growth rate, and need to go to a growth and development specialist clinic in time. When a child’s height is below the third percentile or below -2D (two standard deviations) of the growth curve of normal healthy children of the same race, age and sex, he/she is considered to be of short stature or short stature. In the child’s growth process, parents are more concerned about the child’s height, but it is also easy to enter the present some misunderstandings! Misconception 1: that parents are tall, the child must be tall Although height and genetics have a close relationship, but heredity is only a range of height, up and down there is a deviation of 8 centimeters. If the child’s height to the upper limit of the genetic close, the child’s height is more ideal; if to the lower limit of the genetic close, the child’s height is short. Myth 2: Boys don’t change their voices and girls don’t have menstruation, so they are not considered to be developing, so there is no hurry. Voice change and menstruation are characteristics that mark the time when a child enters the post-pubertal stage of development. At this stage, the child’s bone growth zone (epiphysis) is close to closing, and the countdown to height stopping begins. Myth 3: My child is not late growth 1, late growth is also possible, physical puberty delay. 2, but must be timely examination, exclude disease. 3, miss the best time for treatment – too late to regret. 4.If the bone age is more than 2 years behind the age, and the growth hormone stimulation test is normal, it may be late growth. 5.But if it matches the child’s age, the possibility of late growth has been ruled out.