Ferrari undertook an advanced medical study in Europe and the United States, learning pioneering techniques that she brought back to Argentina.

She designed a vaginoscope, studied radiation therapy at the Curie Institute, and performed a Caesarean section at Columbia University.

[5] There had been five other women in the history of Argentina who had earned medical degrees, and although her enrollment was not desired, there was no legal precedent to bar her admittance.

In the proceedings of the Honorable Consejo Directivo (HCD) on 23 June 1915, it was stated: "Despite their qualifications, for physiological and psychological reasons people of the feminine sex do not meet the required conditions to be engaged as professors in the Faculty [of Medicine]".

The members of the HCD delayed calling together the jurors to fill the vacancy until 1925, altering evidence, ignoring recommendations, and evading a decision.

One adviser, Dr. Speroni, having read her qualifications, sent a message to the dean imploring that they admit her because she was qualified, had shown dedication, and the school was understaffed.

[13] The device significantly improved services available to women in Brazil, and the invention was featured in the articles of the Journal of Gynecology and Obstetrics of Rio de Janeiro.

The innovation won the Grand Prize at the 1924 Congreso Hispano Lusitano Americano de Ciencias Médicas held in Seville, Spain.

[16] When her professorship was finally approved, and she returned to Argentina, a celebration was held on 11 August 1927 at the Jockey Club of Buenos Aires, attended by the Minister of the Interior, José P. Tamborini [es]; the director of the Hospital Militar, Alberto Levenne; her research mentor, Joaquín Llambías; and many colleagues, peers, family members, and friends.

[14] In 1930, she served as the Argentine delegate for the VII Medical Congress of Latin America held in Mexico [5] and presided over the first general session.

[19] She recruited professional women, including physicians, dentists, and attorneys and she organized scientific and cultural discussions and seminars.

[19] In 1925, Ferrari was called to assist a military wife during childbirth at the Hospital Militar Central of Buenos Aires, which had no gynecological unit.

Ferrari insisted it should be introduced and fought against the previous practice of surgical solutions for all cases, advocating that surgery only be used when absolutely necessary.

Following the 1930 coup d'état of José Félix Uriburu with the country's shift to a more conservative stance during the Infamous Decade, Ferrari ultimately was forced to leave the hospital in 1939.

[24] Ferrari's disappointment at having to leave the hospital was offset in 1939, when she was finally made a full professor, receiving the title "Profesor Extraordinario" of the Obstetrics Faculty.

[25] Throughout the 1940s she continued her education, traveling to Cuba, New York, Pennsylvania, Peru, and Puerto Rico, publishing her research in a variety of journals.

[26] In 1946 she resigned as president of the Argentina Federation of University Women,[20] but continued to represent the organization at conferences, such as the Primer Congreso Interamericano de Mujeres, which she attended in Guatemala City in 1947.

[27] After 43 years of teaching at Normal School Nº 3, Ferrari was forced into retirement by the Ministry of Education because she refused to participate in a political contribution fund.

However, by the early 1950s, it was clear that policies were unevenly applied, implementation was erratic, and political cronyism was working against providing health services for those most in need.