Can rabbits give birth the first time 1 year old?

Ive heard that if you dont breed the rabbits before there 6 months old then there pelvis or something sets in place so if they go end up giving brith there pevls collpses something like that...anyways when i have enough money i thinking about buying a bigger hutch with an attached run and to floors, i have two female and im wanting to mate them theyll be just over a year old now will they be fine ingiving birht the 1st time when there 1 year old?