The Supreme Court on Monday agreed to hear a challenge to a law in Colorado that bans "conversion therapy" for young individuals who question their gender identity or sexual orientation. 

The justices will be hearing the arguments of a Christian therapist who argues the ban violates her free speech under the First Amendment, according to NBC News.

The purpose of conversion therapy is to encourage young people questioning their gender identity to stick with the gender they were born with or encourage gay and lesbian youth to change their sexuality. 

About 20 states have banned this kind of therapy. 

Kaley Chiles, the Christian therapist, said some of her Christian clients who struggle with gender identity or their sexual orientation are worried they can't live their lives according to their faith due to their struggles and seek out counseling as a result, according to documents.

"These clients believe their lives will be more fulfilling if aligned with the teachings of their faith, and they want to achieve freedom from what they see as harmful self-perceptions and sexual behaviors," Chiles' lawyers at the Alliance Defending Freedom, said in a statement, according to the outlet.