In June 2009 Antón Castellanos Usigli had the opportunity to travel to Gothenburg, Sweden, to the 19th World Congress for Sexual Health of the World Association for Sexual Health, where he presented a work entitled: “Congreso Morelense Interescolar sobre Sexualidad Humana”. PROMOTING COMPREHENSIVE SEXUALITY EDUCATION AT HIGH SCHOOLS IN CUERNAVACA, MORELOS, MEXICO: THE EXPERIENCE OF A 20- YEAR OLD PSYCHOLOGY STUDENT. In that oral presentation, Antón pointed out the necessity of creating school networks that would support scientific and human rights-based sexuality education at state, national, and international levels.

In September 2009, Antón attended the VII National Congress of Sex Education and Sexology of the Mexican Federation of Sexuality Education and Sexology, where he presented the Spanish version of the work he presented at the World Congress for Sexual Health.