McCormick was impatient for large-scale field trials. “How can we get a ‘cage’ of ovulating women to experiment with?” she asked Sanger. The team considered tests in Jamaica, Japan, India, Mexico, and Hawai‘i. In 1954 Pincus visited Puerto Rico and was suitably impressed. Here was a place where they could undertake, as Pincus expressed it to McCormick, “certain experiments which would be very difficult in this country.”
