Women's Suffrage: here's a timeline that shows the complex politics leading up to the passage of the 19th Amendment (otherwise known as the Susan B. Anthony Amendment.)
Doing research on Margaret Sanger: here is the website where you can get an overview of her papers. The Sanger colleciton itself, as well as many other great collections on birth control and women's health, are held in the Sophia Smith Collection, Smith College, Northampton, Massachusetts.
This Margaret Sanger and her colleague Ethel Byrne, being tried in a New York courtroom for the distribution of obscene devices in 1916. They viewed this commitment to women controlling their own bodies as a fundamental political right, and their own activism as a responsibility to a greater public.