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Before, it was thought that children grew more or less, slower or faster, depending on their place of origin, their genetic makeup or their diet. However, a few years ago, the World Health Organization (WHO) created new patterns of child growth to describe 'ideal child growth'.
These charts demonstrate that all children in the major regions of the world can achieve similar height, weight and degree of development, if they are provided with adequate nutrition, good health care and a healthy environment.
It is a more proactive method of measuring and evaluating children's growth, setting normative parameters and evaluating children and populations against that standard. In this sense, a key characteristic of the new pattern is that it establishes breastfeeding as the biological "norm" and at the same time breastfed infant as a reference standardto determine healthy growth.
The baseline charts above were based on the growth of a random combination of breastfed children and artificially fed children.
The graphs of percentiles They serve the pediatrician to check and compare that the growth and development of the baby is adequate. If your baby is not growing satisfactorily, your pediatrician will find out the causes. Both weight measurement and height are routine checks that should be carried out in the regular consultation that you make with your pediatrician.
The development curves collect the measurement of the parameters that reflect the growth of your child. The main ones are height and weight, although there are tables for head circumference or body fat. None of these data are interpreted in isolation, but in relation to age and sex because the growth pattern is slightly different in boys and girls.
There are graphs for each parameter: weight, height, head circumference, and body fat. The most used are those of weight and height, and they are different depending on whether they are men or women. In your Baby's Health notebook, you will find several percentile graphs, according to age and sex, where there are several lines, each with a number: 3, 10, 25, 50, 75, 90 and 97.
To find out what percentile your baby is in -for example, height-, you must first find his age on the horizontal axis and then his height on the vertical axis. By drawing a line at each point, you will get both of them to intersect on one of the percentile lines on the graph and that will be your child's height percentile.
All percentile lines correspond to normal values. Excessively tall or overweight children will be above the 97th percentile, while excessively short or thin children will be below the 3rd percentile. The important thing is not to have a high percentile, but to grow and gain weight more or less regularly around the same percentile.
So, for example, if your baby is in the 70th percentile for height, it means that compared to 100 other infants, 70 they will measure less than him and 30 more, and that if we put them in a row, your child would be ranked 70th. The percentile 50 would indicate that the child is in the average, and 10, that it is below, although it continues to be statistically normal.
A good sign is that the percentiles remain similar to those at birth and that there has been no no steep descent or ascent with respect to the previous measures. The pediatrician should always check that the percentile for height is consistent with that of weight.
And if a child is below 3 or above 97, the specialist will study the cause, the same as if he does not follow his growth curve at his usual percentile and goes from one percentile to another abruptly.
You can read more articles similar to Height and weight percentiles in boys and girls, in the category of on-site development stages.