It really doesn't matter if you kill does before or during the rut. Just about every alive doe in the woods will be bred at some point during the rut, so you're either killing an already pregnant doe DURING the rut, or a potentially pregnant doe BEFORE the rut.
The effect on deer numbers for next year is pretty even either way, I'd say.
We cut off doe shooting after December 31, but that's just to let the woods settle for the rut...has nothing to do with numbers for next year.
