What now was needed was the breakthrough in contraceptive technology that would make birth control safe, effective, and simple to use.

Once again Margaret Sanger took a leading role in providing this breakthrough, not through her scientific skills but through her contacts with the wealthy in the American birthcontrol movement.

Since WWII great strides had been made in developing the new field of endocrinology, learning about the body's system of hormonal regulation, and under standing sexual physiology. By the 1950's both endocrinology and steroid chemistry had progressed sufficiently to allow for the development of a hormonal contraceptive.