Antlers are the usually large and complex bony appendages of most deer species, mostly worn by males; only female caribou and reindeer have antlers, though these are normally smaller than those of the males. Nevertheless, fertile does from other species of deer have the capacity to produce antlers on occasion, usually due to increased testosterone levels. Each antler grows from an attachment point on the skull called a pedicle. While an antler is growing, it's covered with highly vascular skin… (More on Antler)