Pengukuran Kadar Hormon Progesteron dan Deteksi Birahi pada Sapi Perah yang Disinkronisasi dengan CIDR (Controlled Internal Drug Release)

Heat detection and mating program (breeding) is the right way to be able to optimize the optimum reproductive performance in dairy cows. The design of the research conducted in this study was a pretest-postest design. Consists of four kinds of treatment that P1C1, P1C2, P2C1, and P2C2, each treatment repeated four times. Factors tested are Factor P: the age of the corpus luteum is 15 days (P1) and 10 days (P2), Factor C: remove the implant of progesterone on the 9th day (C1) and on the 13th day (C2). The results obtained by statistical tests indicate that there is no interaction between age differences corpus luteum with the time difference of remove controlled internal drug release (CIDR) (p>0.05). The total sample of 16 dairy cows, 13 samples showed signs of a heat on the three days after removed controlled internal drug release (CIDR). The total percentage of the overall sample showed signs of heat was 81.25%.