Therefore, Andrea Andreen first attended a private school in Fritsla, and was then educated at home by a governess.
She was also the director of the Office for Information and Career Counseling of Uppsala Student Associations[3] She received her medical doctorate in 1933.
The laboratory was transferred to the Stockholm City Health Authority a few years later and was turned into a general clinic, with Andre Andreen as director.
[4] Following the introduction of insulin in 1921, Andreen spent six years at Harvard Medical School in Boston where she worked with Otto Folin in his laboratory.
Together with Ada Nilsson, Alma Sundquist and Gerda Kjellberg and others continued Karolina Widerström's work on sex education and hygiene.
Andreen taught physiology at the Högre lärarinneseminariet in Stockholm from 1921 to 1941, health education at the Brummer school and Statens normalskola för flickor from 1922 to 1929; and genetics and sexual hygiene at the Institute for Social Political and Communal Education and Research.
[3] Andreen was elected to the board of the women's association Nya Idun in 1919 and later served as its vice-president and president.
[5] In the 1930s, Andreen was a member of Frisinnade Kvinnor (Liberated Women) where she contributed to the association's magazine Tidevarvet[6] and promoted sexual hygiene.