Gerty Theresa Cori (née Radnitz, August 15, 1896 – October 26, 1957) was an American biochemist who became the third woman—and first American woman—to win a Nobel Prize in science, and the first woman to be awarded the Nobel Prize in Physiology or Medicine.

Cori was born in Prague (then in the Austrian Empire, now the Czech Republic). Growing up at a time when women were marginalized in science and allowed few educational opportunities, she gained admittance to medical school, where she met her future husband Carl Ferdinand Cori; upon their graduation in 1920, they married. Because of deteriorating conditions in Europe, the couple immigrated to the United States in 1922. Gerty Cori continued her early interest in medical research, collaborating in the laboratory with Carl. She published research findings coauthored with her husband, as well as publishing singly. Unlike her husband, she had difficulty securing research positions, and the ones she obtained provided meager pay. Her husband insisted on continuing their collaboration, though he was discourage from doing so by the institutions that employed him.

With her husband Carl and Argentine physiologist Bernardo Houssay, Gerty Cori received the Nobel Prize in 1947 for the discovery of the mechanism by which glycogen—a derivative of glucose—is broken down in muscle tissue into lactic acid and then resynthesized in the body and stored as source of energy (known as the Cori cycle). They also identified the important catalyzing compound, the Cori ester. In 2004, both Gerty and Carl Cori were designated an ACS National Historical Chemical Landmark in recognition of their work in clarifying carbohydrate metabolism.

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