Fixed-time artificial insemination in cows and buffaloes using an intravaginal releasing progesterone insert

摘要

Inordertodemonstratethefeasibilityofusingfixedtimeartificialinsemination(TAI)inboth,bovineandbuffalofemalesbyapplyinganestroussynchronizationprotocol(i.e.,PregnaHeat-E?),resultsofseveralworksinsixcomercialfarmsfromdifferentVenezuelanregionswerereviewed.Datacomprised219cows(cowsandheifers)and169femalebuffaloes(cowsandheifers).nbsp;Theaverageobservedconceptionrateofbovineheifers,cows,buffaloheifersandbuffalocowswere41.1%,39.26%,0%,and32.73%,respectively.Conceptionrateswerehigherinbovinefemalesthaninbuffaloes.Theoverallconceptionrateforbothbovineandbuffalofemaleswas36.5%.Ingeneral,stronginfluencesofenviromental-genotypeinteractionswereobservedinbovinefemales.Inbuffalofemalesenvironmentalinfluencesalsoplayedaclearroleonconceptionrate.Inaddition,factorsassociatedtoageanddevelopmentinbuffaloheiferswerealsoevidenced.nbsp;ThecostoftheprotocolPregnaHeat#8211;E#8482;wasslightlyhigherthanothers.