DS is 13 and is tiny. He's 140cm / 4ft 5. He is noticeably smaller than all his classmates. I'm 5ft 5 and DH is 5ft 8 so we know he's not going to be massively tall but he doesn't seem to be growing.
He keeps expecting a growth spurt and I think there is some teasing but he brushes it off. He's not started puberty - no hair, voice unbroken.
Should I bother the GP or just leave it.