Reproductive Performance in a Selected Sample of Dairy Farms in Una-Sana Canton, Bosnia and Herzegovina

Abstract

Background. e production of milk and dairy products and their placement on the market represent a constant profit for the farmers/producers in Bosnia and Herzegovina (BH). e profitable operation of the dairy farms is influenced by the reproductive performance of the lactating animals. is study assessed individual animal reproductive characteristics in selected dairy farms and described their reproductive performance indicators. Results. e median age at first insemination was 493 days (5 th -95 th percentile range 429-840), while the age at first calving was 802 days (5 th -95 th percentile range 708-1168). e median pregnancy proportion at first insemination was 40% (5 th -95 th percentile range 17-62), while the cumulative pregnancy rate calculated at day-60, day-80, day-100, and day-120 showed that approximately 64% of all pregnancies happened before day-120. e calculated interservice intervals showed that approximately 69% of the repeat breeding animals came back to the oestrus in the period of 18 to 24 days. is is an indication of very good oestrus detection in selected dairy farms. e mean number of services per pregnancy was 2.61 (range 1-12). e median calving-to-first-insemination interval was 62.5 days (5 th -95 th percentile range 16-408). e calving-to-conception interval was 101 day (5 th -95 th percentile range 36-506). Finally, the calving interval was 385 days (5 th -95 th percentile range 329-773). Conclusions. ere is a need for an organised, regular, and more comprehensive recording system for the reproduction of dairy cattle among dairy farms in Una-Sana Canton. e calculated reproductive measures indicated an undulant trend in reproductive performance among selected dairy farms in Una-Sana Canton. Knowing the apparent reproductive indicators described in this study, the farmers and veterinary authorities may identify and correct areas in their management that contribute to the reproductive underperformance.

An Appropriate Genetic Approach for Improving Reproductive Traits in Crossbred Thai–Holstein Cattle under Heat Stress Conditions

“…Those variations might be due to different genetic architectures, the environment, herd management and practices, and disease. Similarly, Softic et al [37] also reported that extended CFI was influenced by several factors such as nutrition, endometritis, and a lack of estrus detection. The other factor, uterine infection, has been associated with extended CFI in dairy cattle and low reproductive performance [33,38].…”

FSHR gene polymorphism and its association to reproductive traits in Friesian Holstein cattle

“…The calculation of the reproduction traits is described below. Post-Partum Mating (PPM) was calculated by subtracting the first service after the parturition date from parturition date (day) as described [10]. The PPM formula is described in the formula (1).…”

“…Calving Interval (CI) was measured by subtracting the calving date from the date of calving before and recorded in day, as described by [10]. The CI formula is expressed in the formula (3), where n is the calving number.…”

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“…The reproductive performance of modern dairy cows globally has decreased over the past 50 years (Softic et al 2020). This scenario is further exacerbated due to the emphasis on the selection and rearing of animals for specific commercial purposes, which compromises livestock reproduction (Yoo 2010).…”