Document Detail

Endocrine profiles during doe-litter separation and the subsequent pregnancy in rabbits.
MedLine Citation:
PMID:  11579995     Owner:  NLM     Status:  MEDLINE    
This study was carried out to determine the effects of a transient doe-litter separation on plasma prolactin, LH, FSH, estradiol-17beta and progesterone concentrations before artificial insemination and during the subsequent pregnancy. Control does (n=12) had free access to nursing, whereas separated does (n=12) were kept away from their litters for 48 hours before artificial insemination. Both groups were inseminated on day 11 after parturition. Teat stimulation by suckling caused a high increase in prolactin concentrations in separated does (p < 0.0001). Basal prolactin concentrations were observed in both groups on days 8 and 18 of pregnancy. No effect of the treatment was detected on LH and FSH concentrations during the sampling period. A rise of estradiol-17beta concentrations was observed 48 hours after doe-litter separation, compared to control does and to previous values (p < 0.003). Both groups showed low progesterone concentrations before artificial insemination. Pregnant rabbits in both groups showed increased progesterone concentrations on days 8 and 18 of pregnancy. Lower estradiol-17beta concentrations were observed in control does on day 18 of pregnancy compared with separated rabbits (p < 0.003). The results suggest that a transient separation of nursing does from their litters before artificial insemination may promote high follicular steroidogenesis activity leading to increased estradiol-17beta concentrations. This hormonal change could be a result of several stimulatory actions probably triggered by the absence of suckling episodes and may affect the luteotrophic function during the subsequent pregnancy.
E Ubilla; P G Rebollar; D Pazo; A Esquifino; J M Alvariño
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of physiology and biochemistry     Volume:  57     ISSN:  1138-7548     ISO Abbreviation:  J. Physiol. Biochem.     Publication Date:  2001 Mar 
Date Detail:
Created Date:  2001-10-02     Completed Date:  2002-02-13     Revised Date:  2006-06-09    
Medline Journal Info:
Nlm Unique ID:  9812509     Medline TA:  J Physiol Biochem     Country:  Spain    
Other Details:
Languages:  eng     Pagination:  23-9     Citation Subset:  IM    
Departamento de Producción Animal, ETSI Agrónomos, Universidad Politécnica, Madrid, Spain.
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MeSH Terms
Animals, Newborn*
Estradiol / blood
Follicle Stimulating Hormone / blood
Insemination, Artificial
Luteinizing Hormone / blood
Pregnancy, Animal*
Progesterone / blood
Prolactin / blood
Social Isolation*
Reg. No./Substance:
50-28-2/Estradiol; 57-83-0/Progesterone; 9002-62-4/Prolactin; 9002-67-9/Luteinizing Hormone; 9002-68-0/Follicle Stimulating Hormone

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