pincus chang rock

Published April 26, 2012 at 400 × 280 in The History of the Birth Control Pill, Part 5: Clinical Trials
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.

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