A baby deer is officially called a fawn. A female deer can have between one and three fawns per breeding season, depending on the availability of food and her age.
Fawns normally stay with the mother for close to a year. The female normally runs the fawns off before she starts another breeding season. There are exceptions to this as some female fawns can stay with the mother up to 2 years. The males generally leave earliest to establish their own territories and to prepare for the breeding seasons. The spots seen on fawns exist to help camouflage them when the mother hides them while she hunts for food. The fawns do not move the entire time she is gone.