She was a co-founder and participant in the Centro Feminista Paraguayo (Paraguayan Feminist Center), which was pushing for passage of the draft law on equal rights between men and women, introduced by deputy Telémaco Silvera.
[2] The Center was the first feminist organization in Paraguay and[3] included members such as Serafina Dávalos, Carmen Garcete, Carmen Gatti, Felicidad González, Adela Ibáñez, Ermelinda Ortiz, Sabrina Sapena Pastor, Catalina Steward, and Elida Ugarriza, among many others.
Her thesis, entitled "Femininismo: La causa de la mujer en el Paraguay" (Feminism, the cause of women in Paraguay), was published in 1925, and argued from a feminist perspective women's equality in intelligence and virtue, establishing a foundation as to why they should have the right to vote.
[1] She argued that while men were heroes for their participation in war, the sacrifices of women for the country were unrecognized.
[2] During the Chaco War, Larán was a Judge Advocate General in the Comanchaco and Corvalán served as his assistant.