happens more then you think but most of the time the babies are born a month or 2 apart and the mother dosent want press of any kind shape or form , and the doctor ant talk about it unless she ok's it. the doubble uterus happens about 1 in 3,000 women but have both in use is a little more uncommon but happens , It's kinda of cool from a biology stand point , but I feel for any woman who has it.