Endocrine changes during pregnancy, parturition and post-partum in guanacos (Lama guanicoe)

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dc.contributor.authorLuis Riveros, Jose
dc.contributor.authorUrquieta, Bessie
dc.contributor.authorBonacic, Cristian
dc.contributor.authorHoffmann, Bernd
dc.contributor.authorBas, Fernando
dc.contributor.authorSchuler, Gerhard
dc.date.accessioned2024-01-10T13:12:44Z
dc.date.available2024-01-10T13:12:44Z
dc.date.issued2009
dc.description.abstractPlasma concentrations of progesterone (P4), estradiol-17 beta (E2), estrone (E1) and estrone sulfate (E1S) were measured during gestation in eight guanacos kept in captivity. Gestational length was 346.1 +/- 9.8 days. P4 plasma concentrations increased after ovulation and remained elevated until parturition. However, during the last 4 weeks of gestation, a gradual decrease from 4.17 x 1.17(+/- 1) nmol/L to 2.02 x 1.95(+/- 1) nmol/L on day 5 before parturition was observed, followed by a more abrupt final decline to baseline concentrations which were reached on the day after parturition. Mean E2 plasma concentrations started to increase during the eighth month of gestation, and were significantly elevated up to maximum concentrations of 484.7 x 1.21(+/- 1) pmol/L during the last 2 months of pregnancy. Concentrations returned to baseline during the last 2 days of gestation. An increase of E1S concentrations (p < 0.01) was observed in the eleventh month of gestation. Mean El S concentrations remained rather constant during the last 3 weeks of gestation between 4 to 8 nmol/L until parturition, when a steep precipitous decline was observed. E1 concentrations were slightly elevated during the last 4 weeks of gestation, however, maximum concentrations did not exceed 1.5 nmol/L The results show distinct species specific features of gestational steroid hormone profiles in the guanaco in comparison to domestic South American camelids, such as a more pronounced gradual prepartal decrease of P4 concentrations prior to the final decline to baseline, and clearly lesser EIS concentrations during the last 4 weeks of gestation, which lack a continuous prepartal increase. (C) 2009 Elsevier B.V. All rights reserved.
dc.description.funderEU
dc.description.funderComision Nacional de Ciencia y Tecnologia (CONICYT)
dc.description.funderDeutscher Akademischer Austausch Dienst (DAAD)
dc.fechaingreso.objetodigital2024-03-19
dc.format.extent8 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.anireprosci.2009.02.005
dc.identifier.eissn1873-2232
dc.identifier.issn0378-4320
dc.identifier.pubmedidMEDLINE:19304413
dc.identifier.urihttps://doi.org/10.1016/j.anireprosci.2009.02.005
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/78223
dc.identifier.wosidWOS:000271969200014
dc.information.autorucAgronomía e Ing. Forestal;Bas F;S/I;56883
dc.information.autorucAgronomía e Ing. Forestal;Bonacic C;S/I;100304
dc.information.autorucAgronomía e Ing. Forestal;Riveros JL;S/I;128851
dc.issue.numero3-4
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final325
dc.pagina.inicio318
dc.publisherELSEVIER SCIENCE BV
dc.revistaANIMAL REPRODUCTION SCIENCE
dc.rightsacceso restringido
dc.subjectGuanaco
dc.subjectPregnancy
dc.subjectProgesterone
dc.subjectEstradiol-17 beta
dc.subjectEstrone sulfate
dc.subjectCAMEL CAMELUS-DROMEDARIUS
dc.subjectREPRODUCTIVE STAGES
dc.subjectESTRONE SULFATE
dc.subjectLLAMAS
dc.subjectPROGESTERONE
dc.subjectALPACAS
dc.subjectPLASMA
dc.subjectGESTATION
dc.subjectESTROGENS
dc.subjectOVARIAN
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titleEndocrine changes during pregnancy, parturition and post-partum in guanacos (Lama guanicoe)
dc.typeartículo
dc.volumen116
sipa.codpersvinculados56883
sipa.codpersvinculados100304
sipa.codpersvinculados128851
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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