Short Sons

I commented on an old thread, but it seems like no one is responding. Does anyone have a son that is older and was in the lower percentiles for weight and height? Did they follow their curve? We do not have any info on BD but BM was 5'2 or 5'3. Our son was in the 5 percentile as a toddler but now has consistently been in the 30 percentile. Just curious if anyone has a similar scenario or did yours stay on the lower percentiles. We are not too worried about, but just curious.