NEWS ALERT: Alaska Department of Fish and Game, December 10, 2005, 3:00pm:
According to the Alaska Department of Fish and Game, while both the male and female reindeer grow antlers in summer each year, male reindeer drop their antlers at the beginning of winter, usually late November to mid-DEcember. Female reindeer retain their antlers till after they give birth in the spring.

Therefore, accoding to "EVERY" historical rendition depicting Santa' reindeer, "EVERY single one of them, from Rudolph to Blitzen, had to be a girl.

We've should have known....."ONLY women would be able to drag some man, in a red velvet suit, all around the world in one night and never get lost.