Endocrine monitoring and its application to the management of the giant panda

Publication Type:
 Journal Article
Year of Publication:
 2003
Authors:
 Nancy Czekala, Laura McGeehan, Karen Steinman, Li Xuebing, Fernando Gual-Sil
Publication/Journal:
 Zoo Biology
Publisher:
 A Wiley Company, Inc., Wiley Subscription Services
Keywords:
 , , , , ,
ISBN:
 1098-2361
Abstract:

Abstract 10.1002/zoo.10108.abs Urinary estrogens (n=10) and progestins (n=4) were monitored in a total of 10 giant panda females. Estrogens were evaluated with two different immunoassays during the estrous period. The two different methodologies gave similar hormonal profiles, but different quantitative results due to differences in the crossreactivity of the different assay systems. High-pressure liquid chromatography (HPLC) analysis of peak estrogen urine revealed that estrone sulfate was the major component, and estrone glucuronide was a minor component (97:3). A comparison of days of insemination in females that conceived and delivered offspring showed a correlation to insemination on days 1 and 2 post-estrogen peak. An analysis of urinary progestins revealed that they were elevated over baseline concentrations following the estrogen surge during estrus (P<0.0004). Zoo Biol 22:389–400, 2003. © 2003 Wiley-Liss, Inc.

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