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Antlers are paired, solid, bony structures that grow from the frontal bone of the skull in animals of the deer family. Unlike horns, which are permanent and covered in keratin, antlers are shed and regrown annually. This shedding is linked to hormonal changes, specifically a drop in testosterone after the mating season.123

During the growth phase, antlers are covered in a skin layer called "velvet," which is rich in blood vessels and nerves. This velvet is shed once the antlers are fully grown, typically before the mating season begins. Antlers serve as weapons in combat between males and as display organs during courtship, with larger antlers often indicating better health and genetic fitness. Growing antlers is an energy-intensive process, and shedding them helps deer conserve energy for survival, especially during winter.2

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