Word: relaxin
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Dates: during 1940-1949
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...Harvard zoologist last week proved the existence of a new female sex hormone. It had taken him 20 years. The new hormone, named relaxin by its discoverer, may be of interest to at least half the human race-for it may eventually help to make childbirth easier...
...Relaxin's discoverer is gentle, publicity-shy Professor Frederick Lee Hisaw, 52. He found the hormone during long, painstaking studies of the sex life of the pocket gopher, a small prairie animal that lives in burrows like a mole...