You know how transphobes often say things like “When they dig up your bones in the future, they’re gonna see your sex, not your gender”?
That’s actually not quite accurate. The most common bone used to identify sex is the pelvis, which is in fact quite static and remains relatively unchanged after puberty. However, the chest is quite flexible, and changes often throughout a person’s life due to several activities. And the chest is also used for sex identification of human remains.
Many lifestyle changes affect the structure of your chest, such as weightlifting, javelin throwing, and… hormone replacement therapy! Estrogen and testosterone supplements change the chest in ways that are closer to a person of your gender identity, to the extent that a forensic scientist could potentially identify you as transgender simply looking at your bones.
Trans people have trans skeletons!