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Effectiveness of selected methods for manipulating the oestrus cycle and ovulation in mares during the breeding season: A retrospective clinical study

cris.virtual.author-orcid0000-0002-5553-6721
cris.virtual.author-orcid0000-0002-6576-8972
cris.virtual.author-orcid0000-0002-5155-8835
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cris.virtual.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtualsource.author-orcidd4acdb17-bc02-4f0d-af4e-10c3038d84d0
cris.virtualsource.author-orcidf9afb1ae-f16d-4b00-9b01-bceecb2fb187
cris.virtualsource.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtualsource.author-orcida09a4f75-509a-4f84-ab56-c339dfd009a3
cris.virtualsource.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
dc.abstract.enHormones used for the induction of oestrus and ovulation are widely applied in veterinary practice. The objectives of this study were to assess: (1) the effectiveness of cloprostenol in inducing oestrus, and (2) the influence of cloprostenol and human chorionic gonadotropin (hCG) on the incidence of multiple ovulations (MO) and multiple pregnancies (MP). The first group of mares (n = 77), which entered spontaneous oestrus, received hCG to induce ovulation, while the second group (n = 40) had oestrus induced with cloprostenol, followed by hCG injection. The pregnancy rate was 55.8% in the first group and 65% in the second group (P < 0.073). The frequency of MO was significantly higher in the second group (27.5%) compared to the first group (3.9%; P < 0.0006). However, this treatment did not affect the incidence of MP. Endometrial oedema scores at the time of hCG administration decreased significantly over time in both groups. These results suggest that hormonal manipulation of the oestrous cycle during the breeding season and ovulation induction can help ensure satisfactory pregnancy rates. Moreover, cloprostenol can increase the frequency of MO without affecting MP rates.
dc.affiliationWydział Medycyny Weterynaryjnej i Nauk o Zwierzętach
dc.affiliation.instituteKatedra Chorób Wewnętrznych i Diagnostyki
dc.contributor.authorRyszka, W.
dc.contributor.authorKurek, N.
dc.contributor.authorMichlik- Połczyńska, Katarzyna
dc.contributor.authorSowińska, Natalia
dc.contributor.authorKozdrowski, Roland Radosław
dc.date.access2025-11-25
dc.date.accessioned2025-11-25T10:47:47Z
dc.date.available2025-11-25T10:47:47Z
dc.date.copyright2025-10
dc.date.issued2025
dc.description.accesstimeat_publication
dc.description.bibliographyil., bibliogr.
dc.description.financepublication_research
dc.description.financecost2419,20
dc.description.if1,5
dc.description.number4
dc.description.points100
dc.description.versionfinal_published
dc.description.volume34
dc.identifier.doi10.22358/jafs/205117/2025
dc.identifier.eissn2719-8448
dc.identifier.issn1230-1388
dc.identifier.urihttps://sciencerep.up.poznan.pl/handle/item/6106
dc.identifier.weblinkhttps://www.jafs.com.pl/Effectiveness-of-selected-methods-for-manipulating-the-oestrus-ncycle-and-ovulation,205117,0,2.html
dc.languageen
dc.relation.ispartofJournal of Animal and Feed Sciences
dc.relation.pages562-568
dc.rightsCC-BY-NC
dc.sciencecloudsend
dc.share.typeOPEN_JOURNAL
dc.subject.enartificial insemination
dc.subject.encloprostenol
dc.subject.enoestrus
dc.subject.enhuman chorionic gonadotropin
dc.subject.enmare
dc.subject.enmultiple ovulations
dc.subject.enmultiple pregnancies
dc.titleEffectiveness of selected methods for manipulating the oestrus cycle and ovulation in mares during the breeding season: A retrospective clinical study
dc.typeJournalArticle
dspace.entity.typePublication
oaire.citation.issue4
oaire.citation.volume34