Case Report on Improvement of Reproduction Rate in Hanwoo Farms

Abstract

This work was conducted to study the improvement of reproduction rate from the breeding data collected from four farms from January 2007 to October 2010. The average numbers of service per conception were 1) A farm 1.7 ± 0.1 times, 2) B farm 1.5 ± 0.1 times, 3) C farm 1.5 ± 0.1 times, 4) D farm 1.4 ± 0.1 times. The average days from calving to conception was 77.4 ± 4.8 days in A farm, 150.8 ± 11.2 days in B farm, 90.4 ± 4.5 days in C farm, and 71.4 ± 2.5 days in D farm. Number of artificial insemination (AI) service per conception was higher at the 30 days before first AI (2.1 ± 0.2 times) than at the 31 days after first AI, and the days from calving to conception were shorter at the 90 days before first AI than at the 91 days after first AI. After timed AI (TAI) treatment, the pregnancy rate was 60.3% for the 58 cows with reproductive disorder. In order to improvement of reproduction rates, the farms has to improve the accuracy of estrus detection, pregnancy diagnosis, check-up for reproductive health, and control of day for first AI periods after calving. The result suggests that farmers need the careful management and reproductive examination of farm animals to improve of reproductive efficiency.

Keywords

• hanwoo
• breeding data
• reproduction