ON THE CHROMATOGRAPHIC ISOLATION OF TWO DIFFERENT KOBER CHROMOGENS FROM PREGNANT COW'S URINE, WITH SOME REMARKS ON THE ANALYTICAL PROCEDURE

Abstract

Observations are presented which indicate that the 2 main estrogenic hormones present in pregnant cow''s urine are estrone and estradiol-17[alpha]. In the 9th month of pregnancy, these hormones are usually found in amounts of 0.10-0.15 mg/1 and 0.15-0.20 mg/1, respectively, when calculated as estrone and estradiol-17[alpha].