Free Plasma Estrogens in the Deer.

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Abstract
Summary Isolation of free plasma estrogens in the white-tailed Texas deer, Odocoilius virginianus texanus led to identification of estradiol-17α, estradiol-17β, estrone, estriol, epiestriol and 16-ketoestradiol-17β. Because of extremely low quantities and poor recovery no measurements were made for estradiol-17α and estradiol-17β. However, in order of decreasing concentration during pregnancy, from 6 to 23 weeks, the 4 remaining estrogens were: 16-ketoestradiol-17β, estriol, estrone and 16-epiestriol. In general, there was a significant (p<.001) rise in total free plasma estrogens during pregnancy when compared to estrus. No significant variation was observed in total free estrogens during pregnancy from 6 to 23 weeks.