Economics of timed artificial insemination with unsorted or sexed semen in a high-producing, pasture-based dairy production system

Walsh, Declan; Fahey, Alan G.; Lonergan, P.; Wallace, Michael

doi:10.3168/jds.2021-21070

Cited by 2 publications

(1 citation statement)

References 39 publications

(74 reference statements)

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“…Друг вид стратегия е осеменяването на животните да се извърши в строго определено време след хормонална синхронизация на еструса [42][43][44]. Основното предимство на тези програми е възможността за предварително планиране на мероприятията, елиминиране на проблемите с откриване на животните в еструс, по-лесна с работата с голяма група животни и възможност за контрол на времето за овулация [45].…”

Section: фактори влияещи върху заплодяемостта и стратегии при използв...unclassified

Main aspects in use of sexed semen in cattle breeding

Yotov,

Fasulkov,

Atanasov

et al. 2023

JOIAH

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The use of sexed semen in cattle breeding becomes increasingly important in worldwide. Up to date sexing technologies provide an ability to sort spermatozoa with acceptable sperm quality and ensure production of animals of the desired sex. Motivation for use of sexed semen can be the need for rapid renewal of the herd, the desire to increase the genetic level, the requirements for animal welfare and the reduction of costs for maintaining ecological sustainability. Many factors at different levels such as selection of female animals for insemination and type of sexed semen, technological features of the farm and reproductive management affect the conception rate. The current literature analysis shows that the introduction of artificial insemination with sexed semen is an effective tool to accelerate genetic progress. An additional benefit is improvement of the animal welfare by reducing difficult births and low production of the undesired male offspring. Optimization of the animal number in the herds leads to reduction of the greenhouse gases and the waste products from animal husbandry. The pregnancy rate after artificial insemination with sex-sorted sperm is variable and different reasons can lead to unsatisfactory results. This requires a preliminary analysis of their effects and taking measures to minimize their negative impact on the reproductive process. Achievement of economic profitability is related to choosing an appropriate strategy for use of sexed semen, taking into account the specific conditions in the farm. The presented information can be useful in the preparation of various policies for optimization of the reproductive process and development of sustainable cattle breeding in Bulgaria.

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Section: фактори влияещи върху заплодяемостта и стратегии при използв...unclassified

Main aspects in use of sexed semen in cattle breeding

Yotov,

Fasulkov,

Atanasov

et al. 2023

JOIAH

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Influence of Ovarian Status and Steroid Hormone Concentration on Day of Timed Artificial Insemination (TAI) on the Reproductive Performance of Dairy Cows Inseminated with Sexed Semen

Yotov

Fasulkov

Atanasov

et al. 2023

Animals

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This study aimed to evaluate the effect of the ovarian status and steroid hormone concentration on the day of TAI on the reproductive performance of dairy cows subjected to estrus synchronization treatment and timed artificial insemination with sexed semen. Seventy-eight cyclic Holstein cows pre-treated with PGF2α-GnRH were divided in two groups—I (Preselect-OvSynch, n = 38) and II (OvSynch+PRID-7-day+eCG, n = 40)—and inseminated with sexed semen. The presence of preovulatory follicle (PF) with or without corpus luteum (CL), the PF diameter, the estradiol (E2) and progesterone (P4) concentrations on the day of TAI, the pregnancy rate (PR) and embryo loss were determined. On the day of TAI, 78.4% of all the pregnant cows presented a PF (mean size 1.80 ± 0.12 cm) without CL, low P4 (0.59 ± 0.28 ng/mL) and high E2 (12.35 ± 2.62 pg/mg) concentrations. The positive correlation between the size of the PF and the level of E2 in the pregnant cows from group II was stronger than that of group I (R = 0.82 vs. R = 0.52, p < 0.05). The pregnancy rate on day 30 (57.5% vs. 36.8%) and day 60 (50% vs. 26.3%; p < 0.05) and the embryo losses (13% vs. 28.5%) showed better effects of treatment in group II. In conclusion, the ovarian status and the steroid hormone concentration on the day of TAI influence the pregnancy rates of dairy cows subjected to estrus synchronization and timed artificial insemination with sexed semen.

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Economics of timed artificial insemination with unsorted or sexed semen in a high-producing, pasture-based dairy production system

Cited by 2 publications

References 39 publications

Main aspects in use of sexed semen in cattle breeding

Main aspects in use of sexed semen in cattle breeding

Influence of Ovarian Status and Steroid Hormone Concentration on Day of Timed Artificial Insemination (TAI) on the Reproductive Performance of Dairy Cows Inseminated with Sexed Semen

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