Document Detail

Circulating oestrogen concentrations during pregnancy in the African elephant (Loxodonta africana).
MedLine Citation:
PMID:  6822969     Owner:  NLM     Status:  MEDLINE    
Oestrone, oestradiol-17 beta and oestriol were measured in plasma samples from non-pregnant and pregnant African elephants shot in the wild. Enzymic hydrolysis of plasma showed that approximately 90 and 96% of the total (i.e. conjugated plus unconjugated) concentrations of oestrone and oestradiol-17 beta, respectively were represented by conjugated hormones. Unconjugated oestrogens remained low (less than 50 pg ml) in all samples, with no distinction between non-pregnant and pregnant animals. Levels of total oestrone during pregnancy varied between 160 and 594 pg/ml but were not significantly different from non-pregnant values. Total oestradiol-17 beta concentrations were significantly elevated during pregnancy (P less than 0 X 01) and, despite considerable individual variation (193-1428 pg/ml), were consistently higher than non-pregnant values after 6 months of gestation. The elevated levels of oestradiol-17 beta resulted in a reversal of the total oestradiol-17 beta: oestrone concentration ratio at about 6 months of pregnancy. Concentrations of total oestriol did not exceed 103 pg/ml. An indirect method of measurement indicated that oestradiol-17 beta sulphate was probably the most abundant circulating oestrogen during pregnancy in the African elephant.
J K Hodges; C Henderson; A S McNeilly
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of reproduction and fertility     Volume:  67     ISSN:  0022-4251     ISO Abbreviation:  J. Reprod. Fertil.     Publication Date:  1983 Jan 
Date Detail:
Created Date:  1983-03-11     Completed Date:  1983-03-11     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0376367     Medline TA:  J Reprod Fertil     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  121-7     Citation Subset:  IM    
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MeSH Terms
Elephants / blood*
Estradiol / blood
Estriol / blood
Estrogens / blood*
Estrone / blood
Pregnancy, Animal*
Reg. No./Substance:
0/Estrogens; 50-27-1/Estriol; 50-28-2/Estradiol; 53-16-7/Estrone

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

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