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Titolo:
Endocrine profiles during doe-litter separation and the subsequent pregnancy in rabbits
Autore:
Ubilla, E; Rebollar, PG; Pazo, D; Esquifino, A; Alvarino, JMR;
Indirizzi:
Univ Politecn Madrid, ETSI Agron, Dept Anim Prod, E-28040 Madrid, Spain Univ Politecn Madrid Madrid Spain E-28040 im Prod, E-28040 Madrid, Spain Univ Complutense, Fac Med, Dept Bioquim, E-28040 Madrid, Spain Univ Complutense Madrid Spain E-28040 ept Bioquim, E-28040 Madrid, Spain
Titolo Testata:
JOURNAL OF PHYSIOLOGY AND BIOCHEMISTRY
fascicolo: 2, volume: 57, anno: 2001,
pagine: 23 - 29
SICI:
1138-7548(200103)57:2<23:EPDDSA>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROGESTERONE PRODUCTION; PROLACTIN; PLASMA; ESTRADIOL-17-BETA; POSTPARTUM; LACTATION; RELEASE;
Keywords:
hormones; doe-litter separation; pregnancy; rabbits;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Ubilla, E Univ Politecn Madrid, ETSI Agron, Dept Anim Prod, E-28040 Madrid, Spain Univ Politecn Madrid Madrid Spain E-28040 -28040 Madrid, Spain
Citazione:
E. Ubilla et al., "Endocrine profiles during doe-litter separation and the subsequent pregnancy in rabbits", J PHYSIOL B, 57(2), 2001, pp. 23-29

Abstract

This study was carried ut to determine the effects of a transient doe-litter separation on plasma prolactin, LH, FSH, estradiol-17 beta and progesterone concentrations before artificial insemination and during the subsequentpregnancy. 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-17<beta> 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-17<beta> 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-17<beta> 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.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 07:41:17