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Discussion

Abstract

Question: Oxenreider Dr. Erb, was there an increased incidence of dystocia and retained placentas in those cows having high levels of progesterone before parturition and then later for those cows having metritis?

Erb: We had only one case of dystocia and this cow was not included in the summary. The metritis group did include a high percentage of cows retaining the placenta. All cases of retained placenta were accompanied by metritis postpartum. The six cases summarized 3 to 42 days postpartum had first pyometra and then persistent endometritis during the entire period.

Question: Eaton Dr. Erb, in regard to your reports that urinary estradiol-17 alpha and estrone are proportionately higher compared to estradiol-17 beta, would you infer from this that a similar proportional difference would be found in the plasma and be of physiological importance during the cycle or during pregnancy?

Erb: I wouldn't want to be misunderstood on this, I am referring only to the changes in proportion as they appear in the urine. I haven't the slightest idea what this might be in peripheral plasma. It is interesting that we continue to see these rather sizeable changes in proportion as excreted in urine.