Accessing hormone therapy to affirm gender identity as a transgender teen could mean better mental health in the long run than for those who wait until adulthood or never receive treatment, according to a new Stanford University study.

The research comes as an international group of transgender health experts released a draft of the World Professional Association for Transgender Health’s eighth version of the Standards of Care.

It is the first time in nearly a decade the 350-page tome that medical and insurance professionals rely on for guidance is being updated, including the sections focused on transgender health care, reported the New York Times.