2 奶牛生命周期-Cow lifecycle幻灯片

ith pregnancy配种并怀孕РCalving 产犊РInfecundity if IA >2 如果输精次数>2,则可能不孕РIAР21D 21天РICР21D21天РPregnancy Check: Pro, Echo…妊娠检查РIPРIPР42 D 42天Р21D21天РEstrus for detection 发情探测РIA with pregnancy 配种并怀孕РCalving 产犊РInfecundity if IA >2 如果输精次数>2,则可能不孕РIAР21D 21天РICР21D 21天РPregnancy Check: Pro, Echo…妊娠检查РIPРIPР08/01/2018Р7Р© DeLaval 2003 Presentation Name/RefР配种Р发情周期Р08/01/2018Р8Р© DeLaval 2003 Presentation Name/RefР奶牛生理学РEstrous Cycle- Several topics must be discussed to adequately describe the estrous cycle: 发情周期?一是生殖道(解剖学),功能,怎样被调节. 包括卵巢、滤泡、黄体、输卵管、子宫角、子宫颈、阴道、阴户?发情的典型表现、最佳输精时间等?程序化配种可以帮助提高整个牛群的繁殖表现Р08/01/2018Р9Р© DeLaval 2003 Presentation Name/RefР奶牛生理学Р发情-奶牛发情的物理事件及所有相关特征?发情周期-21天,这次排卵至下次排卵的间隔包括: ?Metestrus 发情后期?Diestrus 间情期?Proestrus 发情前期?Estrus 发情期Р08/01/2018Р10Р© DeLaval 2003 Presentation Name/Ref