نتایج جستجو برای: presynchronization
تعداد نتایج: 57 فیلتر نتایج به سال:
Abstract To determine effects of presynchronization and delayed fixed-time artificial insemination (TAI) on pregnancy rates (PR/AI) with sexed semen, 1,844 beef heifers were enrolled in a completely randomized design at 12 locations. Within location, randomly assigned to one five treatments: 1 2), administered prostaglandin F2α (PGF) day -7, gonadotropin-releasing hormone (GnRH) CIDR insert 0, ...
The objectives were to evaluate pregnancy per AI (P/AI) of dairy cows subjected to the 5-day timed AI protocol under various synchronization and luteolytic treatments. Cows were either presynchronized or received supplemental progesterone during the synchronization protocol, and received a double luteolytic dose of PGF2α, either as one or two injections. In Experiment 1, dairy cows (n=737; Hols...
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