The average weight for a baby boy of 9 months is 9.5kg. Your baby's weight is certainly low for his age and falls in the lowest 10% for babies of his age. But you say he is happy and healthy and eats well. I think that he had a reflux problem before which held him back as far as his weight gain was concerned.Now that he is no longer refluxing he should start to pick up weight better. There does not appear to be any need for concern.
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.