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The Free Hospital’s Chief Surgeon, William Graves, and his successor, Frank A. Pemberton, assembled a strong staff of clinical researchers: from left: George V. S. Smith, who with his wife Olive, proposed uses for the synthetic estrogen, DES; John…

Each participant that entered into the Rock-Hertig study was asked to fill out a survey form and monitor her cycle, as well as record dates of coitus. This information was then used during the ‘egg hunting’ process after surgery.

With funding from the Carnegie Institution, Rock worked with Arthur T. Hertig and Eleanor Colby Adams to identify 34 fertilized ova that document the first 17 days after conception. Hertig had completed a fellowship at the Carnegie Institution in…