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Dr. John Rock, a doctor of obstetrics and gynecology in Boston, and Miriam Menkin, Rock s hired lab technician, were the first researchers to fertilize a human egg outside of a human body in February of 1944. Their work was published on 4 August 1944 in an issue of Science in an article entitled "In Vitro Fertilization and Cleavage of Human Ovarian Eggs." This experiment marked the first time in history that a human embryo was produced outside of the human body, proving that in vitro fertilization was possible in humans. The initial approach in the research was to see if experiments involving the fertilization of egg cells in rabbits and rats could be repeated with human egg cells. Based on previous experiments with other mammals, Rock and Menkin believed that the same could be done with human egg cells.