pincus chang rock

Gregory Pincus, Min-Chueh Chang, and John Rock, three scientists employed by Margaret Sanger and Katharine McCormick to develop the birth control pill.

Gregory Pincus, Min-Chueh Chang, and John Rock, three scientists employed by Margaret Sanger and Katharine McCormick to develop the birth control pill.

Gregory Pincus, Min-Chueh Chang, and John Rock, three scientists employed by Margaret Sanger and Katharine McCormick to develop the birth control pill.

Leave a Reply

Your email address will not be published. Required fields are marked *