My DS had weight gain issues. FTT was thrown around but no one actually diagnosed him with it. At 3 months of age, he weighed 3.47kg! He was born at 36w6d weighing 3.195kg. He lost 11% of his birthweight at day 3 and his gains the first three months were very little. Then he started losing weight and that's when I had to start the comp feeding.

At 7 months he was just on 7kg which put him just in between the 3rd and 10th percentiles on the charts. Now at 20 months he's about 10.5kg (haven't weighed him in a long time) and he's still on the small side, but he eats me out of house and home and is happy and healthy.

From what you say, it sounds like Tristan is doing well but if it's going to help put your mind at ease, then perhaps talk to the paed. Either something will be picked up or it will all turn out to be fine.

Oh, also my nephew is 20 months also and is just on 7kg, he eats, drinks, poops, sleeps, is developmentally up with his age. My sister has gone through all sorts of testing and paeds to work out why he's so small and they came back with nothing - he's just a very small kid.

Tristan may just be a small bubba, he may have a massive growth spurt down the track, who knows but as you say you are confident in your supply and his eating habits etc so trust your instincts! I think you are doing a great job