DS just turned 16 and he is 5'4. His voice broke when he was 13/14 and he hasn't grown at all since he was 14. His nutrition and everything is great and he exercises a lot. All his life he's been around the 45th percentile which would make him about 5'9 as an adult. (The double height at 2 thing would also make him 5'8 -9) He hasn't got a beard yet or anything but has a deep voice, armpit hair etc and has had for a while. I am 5'3 and his father is 5'6. He is worried as his height hasn't increased at all for 2 years and he is one of the shortest in his year. He says all the other short people are late bloomers but he isn't. Anyone have any similar experiences?