 Her parents, Mattea Guido and Pierre-Antoine Lanteri, emigrated to Argentina with their two daughters in 1879, and she was raised in Buenos Aires and La Plata.She became, in 1891, the first woman to enroll at the Colegio Nacional de La Plata, a public college preparatory school.Earning a degree in Pharmacology at the University of Buenos Aires in 1898, Lanteri enrolled in the university's School of Medicine with permission from the Dean, Dr. Leopoldo Montes de Oca.