Did Margaret Sanger create a new type of birth control?

No, Margaret Sanger did not invent any type of Birth Control. She learned about the diaphragm, invented in the 1800s and available in Europe, and she was instrumental in importing it to the US as a contraceptive option.

Although Sanger did not personally create the birth control pill, she is known as the Mother of the Birth Control pill because she had throughout her career fought for education of women and their rights. She brought together a philanthropist, Katherine Dexter McCormick and biologist Gregory Pincus to develop the "birth control pill" released on the market as "Enovid" in 1960.