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- Title
A comparative study on productive, reproductive and ovarian features of repeat breeder and normal cyclic cows in the selected areas of Bangladesh.
- Authors
Hasan, Mir Md. Iqbal; Hassan, Md. Maruf; Mohanta, Rupam Chandra; Md. Abu Haris Miah; Harun-Or-Rashid, Mohammad; Juyena, Nasrin Sultana
- Abstract
Objective: The research was accomplished to appraise the productive and reproductive physiology of repeat breeder (RB) cows and compare to normal cyclic (NC) cows. Methodology: A total of 366 RB cows were surveyed from 1859 crossbred and indigenous cows using a questionnaire upon positive sampling of RB syndrome in dairy farms throughout the selected areas of Bangladesh. Out of 366 RB cows, 170 were randomly selected, which were at day 0 of estrous cycle. To compare the physiological characteristics, 170 NC cows at day 0 of estrous cycle were also selected randomly. Results: Results showed that age, BCS, and parity were higher in RB cows than NC cows. Survey on productive characteristics illustrated that milk production (P<0.05) and lactation length (P<0.01) was significantly higher in RB cows compared with NC cows. The study on reproductive features exposed that age at puberty and the first calving age was significantly (P<0.01) lower but the number of service, gestation length, calving interval, and voluntary waiting period were significantly (P<0.01) higher in RB cows than that of NC cows. Ovarian physiological characteristics revealed that estrus duration was significantly (P<0.05) lower in RB cows in comparison with NC cows. In addition, the largest follicular diameter was significantly (P<0.01) lower but vaginal electrical resistance (VER) was significantly (P<0.01) higher in RB cows compared with NC cows at day 0 of the estrous cycle. Conclusion: Results indicate hurly-burly characteristics of ovarian physiology in RB cows. This study could help veterinarians and researchers to define various risk factors associated with RB cows.
- Subjects
DAIRY cattle; CATTLE breeding; PREGNANCY in animals
- Publication
Journal of Advanced Veterinary & Animal Research, 2018, Vol 5, Issue 3, p324
- ISSN
2311-7710
- Publication type
Article
- DOI
10.5455/javar.2018.e283