Data files, selected short publications, laboratory notebooks and other laboratory records, lantern slides and other photographs on Csapo's research on the progesterone hormone in the physiology of uterine function and uterine muscle contractibility. These files contain data on drug effects of progesterone, estradiol, caffeine, steroids on the ovaries and uterus in humans, rabbits and mice. Later laboratory notebooks are in Series 1, Data, 1946-1979.

This collection contains a set of reprints that Dr. Allen gave to the medical library of Washington University in 1965, and the photographs relating to an award he received in 1971 from the St. Louis Medical Society. The reprints include Dr. Allen’s reports of his ground-breaking work on progesterone, the Blue Color Test for DHIA in diagnosis of adrenal tumors, and the development of the “Allen Correction.”