You are very welcome.Of course your baby son should not have a hoarse voice. In children of his age the most common cause is a post nasal drip problem, but you say that he is well and is probably not coughing. Another possible cause is the early stages of a temporary condition of unknown cause seen in young children known as 'spasmodic croup' It will help to use a humidifier with just water in it in his room at night.The average weight for ababy boy of 12 months is 9.8kg and height 76cm Your baby son's weight and height are on the 25th percentile, the lowest 25% of babies of his age on the infant growth chart.\there is no need for concern if he is happy and seems well [apart from his hoarse voice] He may just be following a family growth pattern
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