I helped some buddies who work for the state with the fetal study for the rut map about 8 years or so ago. What was surprising to me were the outlier does that were bred earlier or later than the majority. We sampled one once that measured as being bred in mid March.
It happens... some years ago on our lease I got about 50 pictures of six bucks (two only had one horn) that were chasing a hot doe in a food plot. The winner returned a few hours later with his prize.