Porro Freire trained as an obstetrician and a librarian, and founded the school magazine Compañeros, which grew to a circulation of more than 20,000.
She composed music under the pseudonym "Tacón de Fierro", meaning "iron heel".
[1] In 1941 Porro Freire founded Compañeros, a school magazine which by the 1970s had a circulation of more than 20,000 copies, and which was praised by Martín Echegoyen in a 1959 session of the National Council of Government for its "spiritual and moral" influence.
[1] Porro Freire also created the "Legion of the Little Green Soldier" (Spanish: Legión del Soldadito Verde), a public health organisation for children that taught the benefits of vaccination and the dangers of smoking and drinking.
[1] In 1972 she registered the pseudonym "Tacón de Fierro" (Spanish for "iron heel") which she used to publish music that she had composed.