If a child grows noticeably less than 4–5 centimetres in a year, it is important to look at their growth velocity and the overall trend of their growth curve.
“Practitioner, my child usually stands somewhere in the middle when the class lines up, so their height should still be normal, shouldn’t it?”
This is a very common way for parents to assess their child’s growth.
However, a child’s current height only shows where they are at one point in time. What is often more important is how quickly they have been growing over a longer period.
It is similar to driving a car. We need to look not only at how far the car has travelled, but also at whether its speed is slowing down.
If a child’s growth velocity gradually decreases, they may begin to fall further behind over time, even if they do not currently appear particularly short.
Children do not grow at the same rate throughout every stage of development.
Parents can use the following guide as a general reference:
Most children grow approximately 4–6 centimetres each year.
Annual height gain may commonly reach around 8–10 centimetres.
At any stage, if a child grows less than 4 centimetres in a year, it should not simply be dismissed as late development. It may be a warning sign that deserves further assessment.
In height management, growth velocity reflects how well four key drivers of growth are working together:
Allergies, recurring infections, stress, chronic inflammation, and either excessive or insufficient physical activity may affect how effectively the body directs energy towards growth.
Relevant factors include when puberty begins, how quickly bone age is advancing, thyroid function, growth hormone activity and sex hormone levels.
Deep sleep, total sleep duration, consistently going to bed late and overall sleep quality can all affect a child’s recovery and natural growth rhythm.
Digestive absorption, together with adequate intake of protein, calcium, vitamin D and other essential nutrients, should also be considered when managing a child’s growth.
Practitioner’s Reminder
Rather than measuring a child’s height only occasionally, parents should focus on the following three steps:
1 | Create a regular height-tracking record
Measure your child’s height under consistent conditions every three months, keep a record of the results, and plot them on a growth chart, such as a standard deviation score (SDS) chart.
In most cases, a trend should be monitored for at least 6–12 months.
2 | Look for changes in the slope of the growth curve
If the growth curve begins to flatten or move downwards, the underlying reason should be assessed.
If the curve suddenly becomes much steeper, it is also important to consider the possibility of early puberty and whether the child’s pubertal development should be evaluated.
3 | Consider bone age monitoring
If a child grows more quickly over a short period but their bone age advances even faster, this does not necessarily mean that their final adult height will be better.
Height management is not only about how much a child has grown now. It is also important to consider whether their remaining growth potential is being used up too early.
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