Unless you have them fence in alone by them self, there is no way to tell how many fawns a doe has except through a DNA test. Whitetail does are great mothers and will let fawns, other than their own, nurse.
Young, first time mothers, generally have 1 fawn and then afterwards normally have twins. Having 3, or even 4 does happen on occasion.
I know it depends on the location as well. In Alabama our deer heard is so large that quite a few does on our property from year to year have triplets, but most of them usually drop 1 or 2.
We even had a 3 legged doe for the longest time who had triplets every year until one of the IDIOT hunters that USED to be the club decided he wanted to shoot her. It was a shame. She was a great producer. She usually had 2 bucks out of the 3.
Let me start by telling you the story of two Johns.
John number one went on a day hike with a couple of friends in the Cascade Mountains about an hour from Seattle. He somehow got separated from his buddies and became lost. John was dressed in casual cloths for a warm weather day hike and had nothing but a lunch with him. He spent three days in those mountains and luckily made it out to tell the story.
John number two, a friend of John number one, was much better prepared when...