Paulo Herrera (2nd R, front) hugs the local Deputy Dione Anguiano (2nd L, front) during the handing over ceremony of birth certificates for transgendered people in the Legislative Assembly of Federal District (ALDF, for its acronym in Spanish), in Mexico City, capital of Mexico, on April 11, 2015. 31-year-old Paulo, a hair stylist living in Mexico City, received on Saturday the birth certificate that accredits him as Paula Herrera and female. (Xinhua/Pedro Mera)

Paulo Herrera reacts at the end of a handing over ceremony of birth certificates for transgendered people in the Legislative Assembly of Federal District (ALDF, for its acronym in Spanish), in Mexico City, capital of Mexico, on April 11, 2015. 31-year-old Paulo, a hair stylist living in Mexico City, received on Saturday the birth certificate that accredits him as Paula Herrera and female. (Xinhua/Pedro Mera)

Paulo Herrera poses during the handing over ceremony of birth certificates for transgendered people in the Legislative Assembly of Federal District (ALDF, for its acronym in Spanish), in Mexico City, capital of Mexico, on April 11, 2015. 31-year-old Paulo, a hair stylist living in Mexico City, received on Saturday the birth certificate that accredits him as Paula Herrera and female. (Xinhua/Pedro Mera)

Paulo Herrera (C) reacts at the end of a handing over ceremony of birth certificates for transgendered people in the Legislative Assembly of Federal District (ALDF, for its acronym in Spanish), in Mexico City, capital of Mexico, on April 11, 2015. 31-year-old Paulo, a hair stylist living in Mexico City, received on Saturday the birth certificate that accredits him as Paula Herrera and female. (Xinhua/Pedro Mera)