I am worried about my friends baby. I am mostly worried because he hasn't seen a health professional since he was about 3.5 months old (and not been officially weighed since 10 days) so there is no one who is qualified to comment professionally as to whether his mum (or I) should be worried.
He is 6 months old and approx 15kg. Looking in my red book 10.5kg is 99th centile for 6 months. So he is now nearly 50% heavier than a top weight baby of that age. He has been exclusively breastfed and is only just being slowly introduced to solids so there is no explanation from his diet.
I understand growth charts, they are created from data on healthy babies, so anywhere on the charts is normally fine for a baby. But I know it's worrying when babies fall off the bottom of the charts, so isn't it equally worrying when they head so far off the top of the charts? 15kg is 99th centile for an 18 month old!
My friend is not worried, but I am. What if he is one of those rare babies with a metabolic or endocrine condition? Any medical professionals out there, would you be worried if you saw a baby so far off the charts?