Document Detail


Rapid extraction of faecal steroids for measuring reproductive cyclicity and early pregnancy in free-ranging yellow baboons (Papio cynocephalus cynocephalus).
MedLine Citation:
PMID:  1886098     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A rapid method was developed for extracting and assaying oestradiol and progesterone in faeces (n = 242) of female yellow baboons, free-living in Tanzania. Dose response studies generated slopes of 1.02 (r2 = 0.99) for oestradiol and 1.09 (r2 = 0.99) for progesterone, suggesting that this method accurately measured these steroids in faeces. Parallelism was proved by demonstrating that slopes produced from serially diluted samples were not different from those generated from standard curves (mean P value = 0.53 +/- 0.17 for oestradiol and 0.44 +/- 0.13 for progesterone). Faecal progesterone concentrations measured over several cycles in 2 females increased and decreased in correspondence to visual markers of the luteal phase (i.e. the period between sex-skin detumescence and menses), but the presumed preovulatory oestradiol peak was not observed consistently in all cycles. Progesterone profiles during early to midgestation in 3 females confirmed pregnancy by 25 days (14%) of gestation. Oestradiol profiles were more variable and were not indicative of pregnancy until 40 days (22%) of gestation. Radiolabel-infusion studies revealed that 32% of progesterone (n = 2) but only 11% of oestradiol (n = 2), was cleared through faeces. The latter findings may account for the greater variation observed in temporal oestradiol patterns during the baboon menstrual cycle and pregnancy. Compared with previous techniques, these new methods (i) save considerable time in assaying raw material and (ii) result in high extraction recoveries of faecal steroids (approximately 88% for oestradiol and 91% for progesterone). This approach may be particularly useful for studying physiological function and endocrine-environmental interrelationships in free-living primate species.
Authors:
S K Wasser; S L Monfort; D E Wildt
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of reproduction and fertility     Volume:  92     ISSN:  0022-4251     ISO Abbreviation:  J. Reprod. Fertil.     Publication Date:  1991 Jul 
Date Detail:
Created Date:  1991-10-08     Completed Date:  1991-10-08     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0376367     Medline TA:  J Reprod Fertil     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  415-23     Citation Subset:  IM    
Affiliation:
Conservation and Research Center, National Zoological Park, Smithsonian Institution, Front Royal, VA 22630.
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MeSH Terms
Descriptor/Qualifier:
Animals
Animals, Wild / physiology*
Estradiol / analysis
Estrus / physiology*
Feces / chemistry*
Female
Gonadal Steroid Hormones / analysis*
Papio / physiology*
Periodicity
Pregnancy
Pregnancy Tests / methods
Pregnancy, Animal / metabolism*
Progesterone / analysis
Grant Support
ID/Acronym/Agency:
R01 MH45863/MH/NIMH NIH HHS
Chemical
Reg. No./Substance:
0/Gonadal Steroid Hormones; 50-28-2/Estradiol; 57-83-0/Progesterone

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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