Eugen Steinach (January 28, 1861 – May 14, 1944) was a leading Austrian physiologist and pioneer in endocrinology.
He was born on January 28, 1861 in Austria.
By 1912 he had conducted experiments in the transplantation of a male guinea pig's testes into a female and the castration of the male. The testes secretion, now known as testosterone, resulted in the female guinea pig developing male sexual behavior such as mounting the partner. This led Steinach to theorize that the gland's secretions were responsible for sexuality.
He developed the "Steinach operation," or "Steinach vasoligature," as a way to increase male sexual potency.
He died on May 14, 1944 in Swiss exile.
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