The World Health Organization recently announced a big change to its International Classification of Diseases database, and that's good news for trans people.

The ICD is a centuries-old catalog tracking pretty much every medical condition you could possibly think of. With the release of its 11th edition, the WHO moved gender incongruence — the diagnostic term applied to trans people — from the catalog's mental health section to its new home under sexual health conditions.

In a video explaining the decision to reclassify the condition, Dr. Lale Say, the coordinator of the WHO's Department of Reproductive Health and Research, explains that recent discoveries helped inform the action.

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