Bernhard Zondek

Bernhard Zondek (1891-1966) was a pioneering reproductive endocrinologist primarily known for developing the first reliable pregnancy test in 1928. His work with the gynecologist Selmar Aschheim led to this bioassay for human chorionic gonadotropin, originally using mice, known as the Aschheim-Zondek or A-Z test. Later variations on this test used rabbits or amphibians, leading to the phrase "the rabbit died" to describe the discovery of a new pregnancy using the rabbit test. He was also one of the earlier proponents of the inter-dependence of the endocrine glands under the control of the pituitary gland.

Biography and Obituaries

 * Professor Bernhard Zondek, an Interview. PMID 5330082
 * In Memoriam. Professor Bernhard Zondek PMID 5340670

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