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The effect of embryonic death rates in cattle on the efficacy of estrus synchronization programs.
Reproductive failure in inseminated cattle results from poor fertilization and embryo survival. Recent studies utilizing dairy and beef cattle indicate that fertilization rates are higher forExpand
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Factors affecting conception rate after artificial insemination and pregnancy loss in lactating dairy cows.
Objectives were to determine factors associated with conception rate (CR) and pregnancy loss (PL) in high producing lactating Holstein cows. In Study 1, CR was evaluated in 7633 artificialExpand
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Effect of reducing the period of follicle dominance in a timed artificial insemination protocol on reproduction of dairy cows.
Objectives were to determine the effect of reducing the period of follicle dominance in a timed artificial insemination (AI) protocol on pregnancy per AI (P/AI) in Holstein cows. In experiment 1, 165Expand
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Reproduction in dairy cows following progesterone insert presynchronization and resynchronization protocols.
The objectives of this study were to evaluate the effects of an intravaginal insert containing progesterone (CIDR, controlled internal drug releasing) administered in presynchronization andExpand
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Effect of bST and reproductive management on reproductive performance of Holstein dairy cows.
The objective was to determine the effects of bovine somatotropin (bST) and two artificial insemination (AI) protocols on reproductive performance of Holstein cows. Lactating cows (n = 840) wereExpand
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Timed artificial insemination with estradiol cypionate or insemination at estrus in high-producing dairy cows.
A total of 799 Holstein cows from 3 herds were randomly assigned at 37 +/- 3 d in milk (DIM) to timed artificial insemination (AI) or insemination at detected estrus. Cows were presynchronized withExpand
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Period of dominance of the ovulatory follicle influences embryo quality in lactating dairy cows.
Length of dominance of the ovulatory follicle and exposure to oestradiol (OE(2)) during proestrus can affect fertility. Lactating cows had their oestrous cycle pre-synchronized and were subjected toExpand
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Follicular wave of the ovulatory follicle and not cyclic status influences fertility of dairy cows.
Two experiments evaluated the influence of follicular wave at artificial insemination (AI) on fertility of dairy cows. In experiment 1, data from 5,607 lactating cows enrolled in estrous andExpand
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Characterization of peripartum rumination and activity of cows diagnosed with metabolic and uterine diseases.
The objectives of the current experiment were to characterize the correlation among total serum Ca, nonesterified fatty acids (NEFA), β-hydroxybutyrate (BHBA), and haptoglobin concentrations andExpand
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Concentration of progesterone during the development of the ovulatory follicle: II. Ovarian and uterine responses.
Two experiments evaluated the influence of altering the concentrations of progesterone during the development of the ovulatory follicle on the composition of the follicular fluid, circulating LH andExpand
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