Results 211 to 220 of about 5,537 (244)
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Intraperitoneal insemination in repeat-breeder cows: A preliminary report
Theriogenology, 1995Intraperitoneal insemination of 62 repeat-breeder dairy cows resulted in 9 pregnancies. The pregnancy rate was not different for intraperitoneal or uterine inseminations. In nonpregnant cows, reproductive variables such as the percentage of cows returning to estrus, the average interval from insemination to the next estrus, and the pregnancy rate ...
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The Veterinary Journal, 2009
The incidence of low day 5 milk progesterone in dairy cows has been investigated and the efficacy of treating the problem assessed. The incidence of inadequate milk progesterone (empirically defined as
N R, Kendall, A P F, Flint, G E, Mann
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The incidence of low day 5 milk progesterone in dairy cows has been investigated and the efficacy of treating the problem assessed. The incidence of inadequate milk progesterone (empirically defined as
N R, Kendall, A P F, Flint, G E, Mann
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Reproduction in Domestic Animals, 2020
AbstractThe aim of the present study was to compare the endometrial gene expression of epidermal growth factor receptor (EGFR), nodal growth differentiation factor (NODAL), prostaglandin‐endoperoxide synthase 2 (PTGS2), oestrogen receptor 1 (ESR1) and progesterone receptor (PGR) in repeat breeder cows (RBC) and non‐RBC during diestrus.
María Jaureguiberry +9 more
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AbstractThe aim of the present study was to compare the endometrial gene expression of epidermal growth factor receptor (EGFR), nodal growth differentiation factor (NODAL), prostaglandin‐endoperoxide synthase 2 (PTGS2), oestrogen receptor 1 (ESR1) and progesterone receptor (PGR) in repeat breeder cows (RBC) and non‐RBC during diestrus.
María Jaureguiberry +9 more
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The Bovine Practitioner, 1999
Cows that fail to become pregnant after 3 inseminations may be termed repeat breeders (RBs).This paper reviews the incidence, economics, etiology and management of the RB cow. The incidence of RB in U.S. dairy herds is approximately 20% and depends on herd conception rate. Factors resulting in repeat breeding are discussed.
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Cows that fail to become pregnant after 3 inseminations may be termed repeat breeders (RBs).This paper reviews the incidence, economics, etiology and management of the RB cow. The incidence of RB in U.S. dairy herds is approximately 20% and depends on herd conception rate. Factors resulting in repeat breeding are discussed.
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Evaluating sire effects on cow fertility: Timed AI and repeat-breeder dairy cows
Animal Reproduction Science, 2019In this single herd observational study, there is investigation of the effects of 81 sires (with 11,424 artificial inseminations) on conception rates in 1790 Holstein cows for 5 years. Sires were catagorized based on the published sire conception rate (SCR) into different sire fertility groups (low, average and high fertility sires). The performance of
Hany, Abdalla +2 more
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Treatment of the repeat breeder cow syndrome in Kenya
Tropical Animal Health and Production, 1978One hundred repeat breeder dairy cows have been studied in detail. Although clinically 60 per cent of them were normal bacteria were isolated from the uteri of the majority (90 per cent). Thirty per cent of these isolates were mixed. Intra-uterine infusion of the uteri with diluted Lugol's Iodine solution, supplemented in a few cases by antibiotic ...
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Concentrations of free radicals and beta-endorphins in repeat breeder cows
Animal Reproduction Science, 2007Repeat breeding (RB) is one of the major problems that affect the reproductive efficiency and economy of milk production in dairy animals. So far, the etiopathogenesis of this pathology has not been defined completely. Stress has been hypothesized to be a cause of impaired reproductive efficiency.
RIZZO, ANNALISA +4 more
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Fertilisation and embryonic survival rates in dairy cows culled as repeat breeders
Veterinary Record, 1983Seventy-three Friesian dairy cows culled as repeat breeders were slaughtered three to six, 16 to 19 or 40 to 49 days after insemination to establish fertilisation and embryo survival rates. Fertilisation rate following a single insemination was 72 per cent.
K J, O'Farrell +3 more
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Risk factors for repeat-breeder syndrome in New South Wales dairy cows
Preventive Veterinary Medicine, 2002A retrospective case-control study involving 1041 cow lactations from 10 commercial dairy herds in Australia determined relationships between biographic, production, reproductive and disease factors and repeat-breeder syndrome (RBS) (conception to greater than two inseminations). The study population was stratified into primiparous- and multiparous-cow
N, Moss +3 more
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Progesterone receptors in the endometrium of normal and repeat-breeder cows
Animal Reproduction Science, 1987Abstract Progesterone receptors were measured in the cytosol and nuclear fractions of endometrial cells from repeat-breeder (RB) and normal (NB) cows on day 6 post-breeding (inseminated group) and on days 3, 6 and 7 after estrus (non-inseminated group).
A.P.Almeida Fo, N. Ayalon, B. Bartoov
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