Just think of the monster buck that planted that seed.....seeds!
Seriously, I was told once from a guy....take this for what you want. That the first year a doe is bread, she usually has a buck offspring, the second year, has twins..usually one of each, and the third year there is a good chance of tripplets. I dont know if the number of offspring goes with the does age or what...but I do see a pattern here.