I was at a QDM seminar they said "if you take the doe the fawns will stay in your area. odds are that it is a 50-50 ratio doe fawn buck fawn if you shoot the doe the buck fawn will stay in that area thus giving you 1 more buck for the following year however if you leave the doe she will chase the buck fawn out of the area and he will not return. but i do not know if this is fact or speculation.