Franz Josef Kallmann

Franz Josef Kallmann MD (July 24, 1897 Neumarkt, Silesia – May 12, 1965 New York), a German-born American psychiatrist, was one of the pioneers in the study of the genetic basis of psychiatric disorders. He developed the use of twin studies in the assessment of the relative roles of heredity and the environment in the pathogenesis of psychiatric disease.

As a Jew, he fled Germany in 1933 for the United States. Paradoxically, he had been a student of Dr. Ernst Rüdin, one of the architects of racial hygiene policies in Nazi Germany.

In 1944 he described a congenital endocrine condition (hypogonadotrophic hypogonadism with anosmia) that has come to be known as Kallmann's syndrome.