Abstract
A comparative biological assay of Stilbestrol against crystalline estrone was made. The amounts necessary for the rat unit, i.e., the amount necessary to produce estrus in 50 per cent of a large group of castrate rats, was as follows: Single injection in oil for estrone, 3.0 gamma; for Stilbestrol, 0.95 gamma; and multiple injections, aqueous, for estrone, 0.92 gamma; for Stilbestrol, 0.62 gamma.
Footnotes
- Received May 15, 1940.
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