there are quite a few reasons one might consider on where to foal their babies. Could be the farm where the stallion stands or where one's personal farm is or you want to be close to it, you know and trust, state bred programs or even the sales ring... a Kentucky bred is more likely to bring more than a Wisconsin bred. Remember this also.... a horse may be bred in one state, foaled in another and trained in yet another.... many factors many reasons... one person's preference....