Northwestern University reproductive biologist Neena Schwartz—who discovered the hormone inhibin and its role in the regulation of reproductive cycles—died April 15, according to The Scientist, a magazine for life-science professionals. She was 91.

Among other accomplishments, Schwartz founded the American Women in Science ( AWIS ) in 1971 and was a president of the Endocrine Society in the early 1980s.

Schwartz was born in Baltimore; she earned her undergraduate degree from Goucher College, and received her doctorate from Northwestern University in 1953.

She also wrote about being lesbian, telling BoingBoing in 2010, "In science, you work in unusually close quarters with other people, and you don't talk much about your personal life. But if nobody asks you, and you never tell, your sexuality becomes like this elephant in the room."

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