Evolution of Height and Weight in the First Year of Life

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Evolution of Height and Weight in the First Year of Life

  Autor NN Team Data: 27.02.2009

Evolution of Height and Weight in the First Year of Life

There is nothing more fascinating for a parent than to see its baby grow, to watch and record its progress. And, at the same time, few aspects of child's life worry parents as much. Every mother has the impression that her baby is not big enough, did not take, though, as much as it should in weight. For that, we do not need to worry about, especially if the doctor says all is good.

Probably you see every day in the park, other children the same age as yours and you cannot help but make comparisons. It seems everyone else is a little taller and heavier. It is very possible to be so, but this is not a legitimate reason for concern. There are not two children in the world to raise the same (maybe only if they are identical twins) because environmental factors, heredity, diet, body chemistry affect body's development process and impose its own rhythm to each child. Some of them have a rapid growth phase from the start, others, by contrast, have long plateau phases. It is important to note that all measurements we read about in magazines, all the tables of height and weight of babies, show an average, not an absolute value. There is no tragedy if yours does not fit into those tables. It has all the time to recover. It may be very tiny up to two years, then from two to three years to grow so much that he/she will surpass everyone of its age.

Many healthy babies go through brief periods when they do not grow at all and do not gain weight or even lose weight. However, there is no reason to worry. To be sure that everything is okay you can present the situation to your doctor who will decide if the baby is in the normal range or analysis is needed.

On the other hand, any disease, however slight and even a common cold will make the baby lose a little weight. It is normal to be so, especially if it does not eat normally for several days.

A newborn baby weighs between 2.7 and 4 pounds. If your baby is easier or heavier than that, it might receive a little more attention at birth and shortly after, to determine if everything is okay with it.

Birth weight is influenced by many factors, including sex, maternal health, maternal nutrition during pregnancy, parents' body constitution. In the first week after birth, the baby will lose a few tens of grams (fluid from tissues). By the second week it should begin to gain weight. By the end of the first month it should take about 400 grams.

For now, the average height and weight evolution is the following:

  • Between the first and third months, the child will gain 170 grams per week.
  • Between the fourth and seventh month, will take 700-900 grams per month. Growth slows a bit around the sixth month, so the child will take 450-560 grams per month.
  • At eight months, your baby will weigh two and a half times more than at birth.
  • Between eight and twelve months, it will continue to grow, but slowly. By the first anniversary it should weigh three times more than at birth.

Regarding height, the child will grow to 2.5 inches per month during the first six months and one centimeter per month, from six months to a year. Of course, there are different variations possible, but the height is a much better tool to measure a child at one point because it cannot go down, influenced by health status, as occurs with weight.

Read the English version of this article: Evolution of Height and Weight in the First Year of Life