Cis and Trans are words I first learned in chemistry. They describe different isomers -- compounds with the same chemical formula but different structural arrangements. Sometimes the differences are ...

Anti-trans activists and Republican politicians pushing for bans on trans women and girls’ participation in sports under the guise of fairness to cis women have consistently sought to ...

Vulvar lesions were present in 42 cis women and non-binary persons assigned the female sex at birth. Perianal skin lesions were observed in 45 trans women and 17 cis women, and non-binary individuals.

But the study that the IOC commissioned, and the University of Brighton conducted, found that while trans women are stronger in some respects, like grip strength, cis women have stronger lower bodies.