Growth deficit is a clinical disorder characterized by insufficient growth hormone production, which affects both children and adults. In many cases the causes are unknown, while in other cases a brain injury, tumor or other disorder can cause the deficient production of this hormone.
The symptoms of slow growth first manifest themselves during breast-feeding and early infancy, and are identified by regular growth checks by the child's pediatrician. If the child's growth rate is slower than normal it will be necessary to carry out the relevant tests to see whether there is a deficit of the growth hormone. Sometimes it is not obvious that the child has a slow growth rate until they are two or three years old.
The child's stature will be much smaller than that of most other children of his or her age and gender, though they will not necessarily be out of proportion and it has no effect on the child's intelligence. Quite simply, the child is smaller than what would usually be expected at his or her age.
Because of the characteristics of this disorder, the measures and precautions you need to take with these children relate entirely to their size. These measures will depend on each individual case and whether the child is suffering from any other disorder. However, if they are simply experiencing slow growth due to hormonal problems, you should be aware that these children will follow a different pattern when it comes to changing their child seat.
As you know from other articles on this same site, the child's age in itself is not indicative of when you should change over from one seat to the next: the important thing is the weight and height of the child, so if the child is small they will need to use a child seat for longer until they reach the appropriate height to move up to the next size of seat. The same applies to booster cushions and the final move to using the car's seat belt: it is a matter of size, not age.
For this reason, you need to be even more aware of the need for the child to travel in the correct seat for his or her physical characteristics, and make sure that the changeover is only done when they reach the required height and weight. It is likely that when the child reaches the age when they are capable of reasoning they might resist the use of a particular child seat, but the most important thing at all times is their safety.