Puerto Rico has begun allowing transgender people to update the gender marker on their birth certificates.

"The right to identify our own existence lies at the heart of one's humanity," wrote U.S. District Judge Carmen Consuelo Cerezo in a ruling issued earlier this year. "And so, we must heed their voices: 'the woman that I am,' 'the man that I am.'"

"It's a relief to finally have a birth certificate that truly reflects who I am," said one of the plaintiffs, Daniela Arroyo, in a statement.

The change took effect on Monday.

Most U.S. states now have a process allowing transgender people to update their birth certificates, although not all.

The Kansas Division of Vital Statistics claims it does not have the authority to amend birth certificates to update gender markers. The Transgender Law Center is suing the state over its stance.

Additionally, Tennessee has a statue specifically forbidding the updating of sex identification on birth certificates for transgender people.

In March, Idaho was ordered to allow transgender people to make the change to their birth certificates as a result of a Lambda Legal suit.