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Kansas Agricultural Experiment Station Research Reports
2001; Kansas Agricultural Experiment Station contribution; no. 02-133-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 881; Dairy; Estrus; Heifers; CIDR-B; Fertility
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Full-Text Articles in Life Sciences
Fertility After Synchronization Of Estrus In Dairy Heifers Using Gnrh, Pgf2Α, And Progesterone (Cidr) (2001), A.M. Richardson, B.A. Hensley, Jeffrey S. Stevenson
Fertility After Synchronization Of Estrus In Dairy Heifers Using Gnrh, Pgf2Α, And Progesterone (Cidr) (2001), A.M. Richardson, B.A. Hensley, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
Our objective was to determine fertility of heifers after synchronization of estrus using PGF2", preceded by progesterone, GnRH, or both. Dairy heifers (n = 246) were assigned randomly to three treatments: 1) 50 :g of GnRH given 6 d before 25 mg of PGF2 (d "“1) plus a used intravaginal progesteronereleasing insert (CIDR-B; d "“7 to 0; CIDR+GnRH); 2) same as CIDR+GnRH without the GnRH (CIDR); and 3) same as CIDR+GnRH without the used CIDR (GnRH). All heifers were fitted with Heat- Watch® patches and characteristics of estrus examined before AI included duration of estrus, number of standing events, and …