This morning I came across the most in depth article called Indra Devi, Mother of Western Yoga.
Indra Devi, originally named Eugenie Peterson is the lady to thank for making yoga accessible for women. Born today May 12, 1899 in Latvia, we celebrate her life. She was a trained acrtress who traveled while there was civil war at home. At the young age of fifteen she read her first yoga book
The Maharaja finally intervened and Krishnamacharya agreed to take her on as a student. : strict discipline, long hours of practice, diet restrictions, no use of a stove to keep warm. She had to keep up with all the requirements of the male students. Some of her fellow students were to become the great masters: K. Pattabi Jois and B.K.S. Iyengar. She experienced a complete recovery from her heart ailment”
~ Susan Anernethy http://www.amazingwomeninhistory.com/indra-devi-mother-of-western-yoga/