Growing up is an individual experience
Kilo after kilo, centimetre after centimetre. In the first
months of life a child's growth occurs so fast that we are
perplexed. Let's take, for example, height: in the first
four-five weeks a new-born can grow even a centimetre a
week. An increase that stabilizes already in the second
trimester, sometimes creating some worries in parents. But
an adult's future height has nothing to do with the
quickness of growth in the first weeks: height is written in
the child's genes and every individual follows an individual
growth rhythm.
What counts is that the increase is regular and proportional
to the increase of weight. Obviously it is the paediatrician
that establishes the child's normal development, that,
thanks to the help of particular tables called "percentile
diagrams", it is able to verify the regularity and
consistency of growth in the height of every child. The
tables indicate the average values of children divided by
age and sex, relative to their weight, height and cranial
circumference and they allow to establish if, based on the
different parameters taken, a child is or not in the
appropriate "percentile" for his age.
So let's see what the "standard" measures of growth are in
height.
• From birth to three months: a new-born baby is,
averagely, 51 centimetres long (50 for little girls) though
a height that is 4 centimetres more or less is to consider
perfectly normal. In the first three months the increase of
length is usually 5 centimetres in the first month, 2-3
centimetres in the second and 2 centimetres in the third.
The average height at the end of the third month is about
60-62 centimetres considering if it is a little boy or a
little girl.
• From 3 to 6 months: in the second trimester
children grow only two centimetres a month to get averagely
to 68 centimetres for little boys and 66 for little girls.
• From 6 to 12 months: the increase of height begins
to slow down and it stabilizes on 1-2 centimetres a month.
At their first birthday a little boy is averagely 78
centimetres tall and little girls are 76.
• From 12 to 24 months: there is a regular increase
of height that is normally considered adequate in the tables
if at the end of the second year it reaches a minimum of 82
cm and a maximum of 94 for little boys and a minimum of 81.7
cm. and a maximum of 82.2 for little girls.
• From 2 to 3 years: a normal height is between a
minimum of 91.5 cm. and a maximum of 103 for little boys and
a minimum of 90 cm. and a maximum of 102 for little girls.
Nevertheless, it is important to underline that a slowdown
of growth or some points less compared to the expected
parameters is not a symptom of a physical problem. The
regularity in height development mostly depends on
individual rhythms of every single child: there are children
that are more precocious and others that are slower,
children that grow centimetre after centimetre with perfect
regularity and others that proceed with skips. A standard
parameter to establish before-hand if the child will become
a giant or if he will stay small does not exist. Many
factors intervene on the child's height growth. The growth
potential of a child is for example mostly determined by his
genetic patrimony that he has inherited by his parents. This
is a factor that cannot be changed. But certainly
unfavourable environmental conditions can prevent the child
to reach the height to which he is potentially destined.
So a healthy, varied and well-balanced diet, like the
possibility to run and jump and, later on, a habitual sport
activity are excellent incentives for an optimal growth. But
they are not enough by themselves. It has been proven, in
fact, that children that do no receive the right quantity of
attention and stimulus grow less compared to other children
their age. Some cuddles more than usual and some time to
invent new games to play together, best if outdoors, will be
a real nostrum for their growth. The growth of their body
and...their mind.