By Adrianne Noe
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The hunt was on. When Yale physician Elizabeth Maplesden Ramsey described "her" prize specimen for the Department of Embryology of the Carnegie Institution of Washington in 1938, she joined throngs of others who had participated in the greatest effort to collect, organize and study human embryos. The specimen she described was among the youngest embryos ever accessioned into the collection (thirteen to fourteen days old); nevertheless she pointed out the importance of work that had gone before by acknowledging other extremely young embryos and the contributors for whom they were named -- the so-called Peters and Miller embryos -- estimated to have been a day or ...