Assay of Cows’ Urine for Pregnanediol

Abstract
Urine samples collected during the 3rd, 4th, 5th, 6th, 7th, and 8th mo. of gestation were tested gravimetrically for pregnanediol with the Astwood-Jones method and for sodium pregnanediol glucuronidate with the Venning and Browne Method. No pregnanediol was recovered. If present, the quantities were too small to be measured by these procedures.