Both male and female reindeer grow antlers each summer. The older males drop their antlers between late November and mid December. Female reindeer retain their antlers till after they give birth in spring. This means that Dasher, Dancer, Prancer, Vixen, Comet, Cupid and Blitzen, as well as Rudolph, are females.
We should’ve known….ONLY women would be able to drag a big-butt man in a red velvet suit all around the world in one night and not get lost.