Gaudreau, born in Montmagny, studied with the Ursulines.
[3] In 1879, she married Henri-Edmond Casgrain[4] (1846-1914), dental surgeon, inventor, alderman and first Quebec motorist.
[5] She trained as a dentist under her husband, a dental surgeon who was 15 years her senior.
[6] After graduating from the "Dental College of the Province of Quebec" (predecessor to the McGill University Faculty of Dentistry) in 1898, she became the first woman in Canada to be officially admitted to the profession of dentistry.
[10] The city of Quebec placed a plaque on the house where she lived at 180 Aberdeen Street.