A group of current and former college athletes recently filed a lawsuit against the NCAA arguing that letting swimmer Lia Thomas — a biological male who claims to be female — compete in the national championships in 2022 violated their federal rights under Title IX.

Thomas shattered women’s swimming records after he started competing against female swimmers, and he was even nominated for NCAA Woman of the Year.

Letting men compete in women’s sports reverses 50 years of advancements for women and effectively erases women’s athletics.

It hampers girls’ abilities to compete for athletic scholarships, and it hurts their professional opportunities as adults. In some sports, it can even be dangerous.

Former NCAA swimmer Riley Gaines is leading the lawsuit along with 15 other collegiate athletes.

Below is a segment from ABC News covering the story.