In Missouri, most adult and yearling does have twins each year. The folk tale that old does tend to be barren is a myth. Researchers documented fetuses in does over 15 years of age. In fact, some researchers suggest that older does are more successful mothers because they are experienced and have the best territories. 0.40 1.67 1.81 Peak fawning takes place in late May and June and begins when pregnant does isolate themselves and drive other deer from their fawning areas.
Adult deer use the same areas each year.
The establishment of fawning territories is thought to limit social stress and help distribute populations evenly. Territories also may prevent newborn fawns from imprinting on deer other than their mothers. Does may give birth while standing but often are bedded during delivery. The actual birthing process lasts 30 to 150 minutes with twins born 15 to 30 minutes apart. After giving birth, the doe consumes placental membranes and afterbirth-probably to reduce scent and recycle nutrients.