OII (Organization Intersex International ) is a non-profit organization founded by Curtis E. Hinkle  in Quebec, Canada in 2003. Its non-centralized network is mainly to provide a channel for non-English speaking partners of Yin and Yang outside the United States . Its website currently provides information in 10 languages, with members covering North and South America, Europe, Asia and Australia, and is the largest intersex organization in the world. Committed to protesting against the non-recognition of the existence of Yin-Yang people and demonstrating the diverse and rich identities and cultures of Yin-Yang people . The organizational spirit of OII is to allow everyone's differences to be treated appropriately. And hope that systematic changes will be imposed on the fear, shame, secrets and stigma imposed on children and adults of Yin and Yang .  

OII (International Organization of Yin and Yang People) is committed to ending the fear, shame, secrecy and stigma caused by the following situations to children and adults through systematic changes. 

Normalize and dispose of people who are born with atypical physiological structures without consent.
Without explanation and consultation to the client, the client was appointed as a specific gender without authorization.

The Organisation Intersex International is a non-profit organization. It was originally incorporated in the Province of Quebec, Canada. The organization was founded in 2003 by Curtis Hinkle and is a decentralized network established to give voice to intersex people both outside and inside the USA , those speaking languages ​​other than just English, and people who do not fit the medicalized categories of disorder promoted by some other intersex groups. It is for people born with bodies which have atypical sex characteristics. OII resists all efforts to make intersex invisible, including genital mutilation, medicalization, and normalization without consent and offers another face to intersex lives and experience by highlighting the richness and diversity of intersex identities and cultures.

The Organisation Intersex International (OII) is devoted to systemic change to end the fear, shame, secrecy and stigma experienced by children and adults through the practice of non-consensual normalization treatments for people born with atypical anatomy, and the arbitrary assignment of a particular gender without an informed consultation with the individual concerned.