While the general consensus is that Magpie feathers, Peacock feathers, Noh stubs, and Monarch antlers are feminine, the forest was never intended to be made about gender. You should use whatever antlers you want.

If a stag wears the magpie feathers, then the magpie antlers are male magpie antlers
if a doe wears the magpie feathers, then the magpie antlers are female magpie antlers.

Set pieces don't have genders.