Along with distinct facial features, the other specific trait is that of stature. Around 50-70 percent of those individuals with Noonan syndrome will have short stature. Abnormal levels of the growth hormone cause slow growth. However, when they are born, these people will be of normal length and weight. The slow growth symptoms happen over time. When they reach the age of two, the child's progress slows, and the disease becomes more prominent. The average height for women Noonan syndrome sufferers is 5ft or 153cm, and in men, it is 5ft 3im, or 162.5cm. A human growth hormone can sometimes help these children grow and reach normal height, but only if doctors administer the hormone early enough.
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