A review of embryonic mortality in cattle

Ayalon, N.

doi:10.1530/jrf.0.0540483

Cited by 270 publications

(156 citation statements)

References 42 publications

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“…Suppression of PGF 2α secretion and maintenance of the corpus luteum are obligatory steps for establishment of pregnancy in cows, and failures in this process can cause the loss of up to 40% of the pregnancies (Ayalon, 1978;Maurer and Chenault, 1983;Thatcher et al, 1994). Reducing PGF 2α secretion through the feeding of PUFAs could improve fertility by reducing embryonic losses caused by defective suppression of PGF 2α secretion during early pregnancy.…”

Section: Dietmentioning

confidence: 99%

Effects of dietary fatty acids on reproduction in ruminants

Mattos

Staples²,

Thatcher³

2000

Reviews of Reproduction

296

179

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Section: Dietmentioning

confidence: 99%

Effects of dietary fatty acids on reproduction in ruminants

Mattos

Staples²,

Thatcher³

2000

Reviews of Reproduction

296

179

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“…During periods of dietary mineral insufficiencies, essential minerals will be cannibalized from body tissues to support milk production, which ultimately affects the quality and quantity of milk as well as reproduction [6,7]. [8] Demonstrated that supplemental metal amino acid chelates (AACs) were more bioavailable than inorganic metal salts (IOMs) and resulted in improved reproductive performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Feeding a Combination of Zinc, Manganese and Copper Methionine Chelates of Early Lactation High Producing Dairy Cow

El¹,

Mohsen²,

Mohamed³

2012

FNS

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The objective of the study was to compare the effect of feeding mixed chelated minerals (Mn, Cu and Zn) methionine on dairy cow productive performance and milk yield and its components. The trial was conducted with dairy cows across various stage of lactation. The experimental treatments include chelated minerals (15 mg Zn as Zn Met, 20 mg Mn as Mn Met, 10 mg Cu as Cu Met). Inorganic mixture contains (15 mg Zn as ZnSO 4 , 20 mg Mn as MnSO 4 , 10 mg Cu as CuSO 4 ) in sulphate forms. The experiment was commenced in the dry period of cows, 6 weeks before calving, and after calving the first three months of lactation was taken into consideration. Milk samples were collected from each cow evening and morning for estimation of milk yield production. The inorganic metals caused a significant decline (P < 0.05) in digestibility coefficients, nutritive value, nitrogen utilization, cell wall constituents, total VFA's, rumen volume, microbial and nitrogen synthesis compared to the organic metals. The treated group (chelated minerals) improved the milk yield, and the milk fat percentage of animals across various stages of lactation as compared to inorganic minerals treated group of animals, and no significant differences were observed among groups concerning the entire blood constituent.

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“…The number of services per conception is a variable that results from a well-done heat verification, a wellconducted and successful insemination, a good fertilization rate and a low early embryonic death rate (Ayalon, 1978). The number of services per conception obtained in this experiment was relatively high, since a S/C value of 2.0 is considered normal or acceptable.…”

Section: Resultsmentioning

confidence: 82%

Gluconeogenic supplements do not affect production, reproductive traits and blood metabolite of holstein cows during the transition period

Oliveira

Pires

Meyer

et al. 2004

Sci. agric. (Piracicaba, Braz.)

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The use of gluconeogenic supplements for dairy cows during the transition period has produced contradictory responses in the literature, making it difficult to recommend them. The objective of this trial was to evaluate supplementation with propylene glycol (PG), calcium propionate (CP), and "Dairy Power Drench ® " (DR) on the transitional period of Holstein cows. Parameters studied were variation of body condition score (BCS), body weight (BW), milk production (MP), reproductive efficiency and nonesterified fatty acid concentration (NEFA). One hundred and sixty five animals from two commercial herds were used. Treatments consisted of: C-Control; DR-administration of "Dairy Power Drench ® " (3 applications) during postpartum; CP-daily administration of calcium propionate (500 g); PG-daily administration of propylene glycol (500 mL). Variation sources studied were the effect of treatments and blocks as function of farm and parity. No interaction between time (weeks) and treatments, or treatment effects, were found for BCS. However, there was a quadratic effect of time. Body weight and its variation were not affected by treatment nor by the time × treatment interaction. However, a quadratic effect of time was observed. An interaction time × treatment was observed on MP, but possible differences within each week were not detected. Treatments also did not affect reproductive efficiency parameters. On average, the number of days to first detected postpartum estrus was 69.5, with 2.23 services per conception and 172.6 days open. The mean concentration of nonesterified fatty acids was 376.6 mmol L -1 and no effect of the interaction time × treatment, or of treatment, was observed. However, a linear effect was observed with time, with a decrease of 48.2 mmol L -1 per week. Key words: propylene glycol, calcium propionate, dairy power drench, Holstein cow, reproductive efficiency PRODUTOS GLICONEOGÊNICOS NÃO AFETAM RESPOSTAS PRODUTIVAS, REPRODUTIVAS E SANGÜÍNEA DE VACAS HOLANDESAS EM TRANSIÇÃORESUMO: O uso de produtos gliconeogênicos para vacas leiteiras no período de transição tem gerado respostas contraditórias na literatura, dificultando a sua recomendação. O objetivo deste experimento foi avaliar a suplementação de propileno glicol (PG), propionato de cálcio (PC) e "Dairy Power Drench ® " (DR) no período de transição de vacas leiteiras sobre a variação do escore da condição corporal (ECC), peso vivo (PV), produção de leite (PL), eficiência reprodutiva e concentração plasmática dos ácidos graxos livres (AGL). Foram utilizadas 165 fêmeas de dois rebanhos comerciais. Os tratamentos foram: C-Controle; DR-3 aplicações de "Dairy Power Drench ® " no pós-parto; PC-500 g diários de PC e PG-500 mL diários de PG, até o 50º dia pós-parto, em média. As causas de variação estudadas foram efeito de tratamento e efeito dos blocos formados em função da fazenda e do número de partos. Não foi observado efeito de interação de tempo (semanas) × tratamento ou de tratamento sobre ECC. Entretanto, houve efeito quadrático de tempo. ...

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A review of embryonic mortality in cattle

Cited by 270 publications

References 42 publications

Effects of dietary fatty acids on reproduction in ruminants

Effects of dietary fatty acids on reproduction in ruminants

Effect of Feeding a Combination of Zinc, Manganese and Copper Methionine Chelates of Early Lactation High Producing Dairy Cow

Gluconeogenic supplements do not affect production, reproductive traits and blood metabolite of holstein cows during the transition period

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