Post partumSubclinical Hypocalcaemia and Effects on Ovarian Function and Uterine Involution in a Dairy Herd

Kamgarpour, Reza; Daniel, R.C.W.; Fenwick, D. C.; McGuigan, KR; Murphy, G. M.

doi:10.1053/tvjl.1999.0348

Cited by 28 publications

(22 citation statements)

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“…Uterine involution was judged by rectal examination of the uterine horns every 2 days starting at Day 3 post partum until no changes were detected between two consecutive examinations (Kamgarpour et al 1999). The diameter of each uterine horn (pre-gravid and non-gravid) was estimated at the level of the anterior edge of the inter-cornual ligament by fingers (Shawki 1983).…”

Section: Judgment Of Uterine Involutionmentioning

confidence: 99%

Effect of enhancement of uterine involution and earlier initiation of post-partum cyclicity on the reproductive performance of buffalo

Ramoun

Darweish²,

El-Ghait³

et al. 2006

Reprod. Fertil. Dev.

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The aim of the present work was to study the effect of either gonadotrophin-releasing hormone (GnRH)-prostaglandin PGF2+/--GnRH (G-P-G) or equine chorionic gonadotrophin (eCG)-PGF2+/--GnRH (eCG-P-G) regimes with or without intramuscular injection of ergometrine maleate (Methergin) within 24 h post partum on the uterine involution, initiation of post partum cyclicity and subsequent reproductive performance of buffalo. A total of 60 parturient Egyptian buffalos (2-4 lactations) were used to conduct this study. The involved animals were allotted into two main groups (A and B), each with 30 animals, on the basis of whether buffalo cows received an i.m. injection of 3 mg of Methergin within the first 24 h post partum (A, Meth. T) or not (B, Meth. NT). Each main group was subdivided into three subgroups: A1, A2 and A3 in case of A and B1, B2 and B3 in case of B. The G-P-G regime was applied on both A1 (Meth. T) and B1 (Meth. NT) buffalos, where each individual received two i.m. injections of 0.020 mg GnRH analogue (buserelin) at Days 18 and 33 post partum with i.m. injection of 25 mg PGF2+/- (Dinoprost) in between at Day 25. The eCG-P-G regime was applied on both A2 (Meth. T) and B2 (Meth. NT) buffalos, where each individual received i.m. injection of 1000 IU eCG, 25 mg of PGF2+/- (Dinoprost) and 0.020 mg of GnRH analogue (buserelin) at Days 8, 18 and 25 post partum, respectively. The A3 subgroup (Meth. T, alone) was control for A1 and A2 subgroups and the B3 subgroup was the non-treated control for all subgroups. There was a significant (P< 0.01) decrease in the days required for complete uterine involution in subgroups A1, B1 and A3, indicating the enhancement of uterine involution. The post partum cyclicity was initiated earlier in all of the treatment regimes applied in the present study, as was indicated by significant (P < 0.01) decrease in the days to first ovulation in these subgroups compared with the non-treated control subgroup. The reproductive performance of treated buffalos improved as was shown by the significant (P < 0.01) decrease in days to first service, days open and calving interval. It is concluded that enhancement of uterine involution and/or earlier initiation of post-partum cyclicity improve the reproductive performance of buffalos.

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Section: Judgment Of Uterine Involutionmentioning

confidence: 99%

Effect of enhancement of uterine involution and earlier initiation of post-partum cyclicity on the reproductive performance of buffalo

Ramoun

Darweish²,

El-Ghait³

et al. 2006

Reprod. Fertil. Dev.

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“…In addition, indirect costs may be incurred because of increased risk of associated health problems and culling. Studies have helped both to elucidate the etiology and effects of milk fever (Kamgarpour et al, 1999;Gröhn et al, 2003;Østergaard et al, 2003) and to provide strategies for reducing the incidence of milk fever (Horst et al, 1997;Sörenson et al, 2002). Both the concept of DCAD and its manipulation have been investigated to prevent the occurrence of milk fever postpartum (Block, 1994;Moore et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Formulation and Amount of Potassium Fertilizer on Macromineral Concentration and Cation-Anion Difference in Tall Fescue

Swift

Bittman

Hunt

et al. 2007

Journal of Dairy Science

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This study investigated the feasibility of altering the dietary cation-anion difference (DCAD) in grass by altering the grass variety and the amount and formulation of K fertilizer application. In experiment 1, treatments were combinations of 2 varieties (Barcel and Hi-Mag) of tall fescue (Festuca arundinacea Schreb); 2 rates of K (0 and 250 kg/ha), supplied as KCl; and 2 rates of Mg (0 and 60 kg/ha), supplied as MgO. In experiment 2, K fertilizer was applied at 0 or 125 kg/ha as KCl or K2SO4. There was no difference between HiMag and Barcel tall fescue in the concentrations of Mg, S, and Cl. Application of K fertilizer decreased concentrations of Mg, but the magnitude of the decrease was not consistent across harvests. Conversely, application of Mg fertilizer increased Mg concentrations, but again, the magnitude of the increase was not consistent across harvests. The concentrations of Ca were higher in HiMag than in Barcel tall fescue, with the magnitude of the difference increasing from first to last harvest. Potassium fertilizer decreased Ca concentrations in the first, fourth, and fifth harvests only. Calcium concentration was decreased by a greater magnitude in HiMag tall fescue as a result of Mg fertilization. The HiMag tall fescue contained lower concentrations of K than did Barcel tall fescue in the first, second, and third harvests. Application of K fertilizer increased the K concentration in all 5 harvests but did not affect Na concentrations except in the last harvest. The HiMag tall fescue contained less Na than did Barcel, but the magnitude of the difference was affected by K and Mg fertilization. Application of K fertilizer decreased S concentrations in first-harvest grass, increased concentrations in second-and third-harvest grasses, and had no effect in fourth-or fifth-harvest grasses. Application of Mg fertilizer decreased S concentrations of tall fescue. Application of K fertilizer increased DCAD values for grass harvested from the second through fifth harvests. The increase in DCAD attributable to K fertilizer was less in HiMag than in Barcel tall fescue. Application of K fertilizer as K2SO4 increased dry matter yield and S concentrations of HiMag tall fescue, whereas K applied as KCl increased concentrations of K and Cl. There was no effect of fertilizer formulation on Na concentrations. The DCAD was lower in HiMag tall fescue fertilized with K2SO4 compared with that fertilized with KCl. This study showed that DCAD of grass can be manipulated by the choice of grass variety, fertilizer formulation, and fertilizer application rate.

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“…In addition, Eldon et al (1988) reported that Ca concentration decreased from autumn to summer season (2.5 vs. 2.3 mmol/L) in lactating dairy cows. Kamgarpour et al (1999) found higher Ca concentrations in summercalving cows than in winter-calving cows (2.26 vs. 2.17 mmol/L). Conversely, Jonsson et al (1997) found no differences in Ca concentration between cows calving in summer and winter months (2.34 vs. 2.32 mmol/L).…”

mentioning

confidence: 74%

“…Martinez et al (2012) found similar Ca concentrations when comparing 0 and 7 DIM in normocalcemic cows and in cows with SCH. Kamgarpour et al (1999) reported that cows, once recovered from the initial Ca nadir at parturition, experience a subsequent Ca nadir at 6 and 9 DIM when calving in winter and summer, respectively. In addition, Eldon et al (1988) reported that Ca concentration decreased from autumn to summer season (2.5 vs. 2.3 mmol/L) in lactating dairy cows.…”

mentioning

confidence: 99%

Associations of subclinical hypocalcemia with fertility in a herd of grazing dairy cows

Sedó¹,

Rosa

Mattioli

et al. 2018

Journal of Dairy Science

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The main objective was to assess the associations of subclinical hypocalcemia (SCH), diagnosed at parturition (SCH-0) and 7 d in milk (SCH-7), with fertility in a herd of grazing dairy cows. Additional objectives were to characterize Ca concentration on 0 and 7 d in milk (DIM), assessing the risk factors for SCH-0 and SCH-7 and also the relationship with health status (metritis, endometritis, subclinical ketosis, and culling). A prospective observational study was carried out in a dairy farm in Argentina. Holstein cows (n = 126) were body condition scored (BCS, 1-5) on -21 ± 3, 0, 7 ± 3, and 28 ± 7 DIM and blood was collected on 0 and 7 ± 3 DIM to determine Ca and β-hydroxybutyrate concentrations. Calcium concentrations <2.0 and <2.14 mmol/L were used to define SCH-0 and SCH-7, respectively. The associations of SCH with (1) the odds for pregnancy to first service (P1AI) and pregnancy by 100 DIM (P100) were evaluated by logistic models, (2) the services per pregnancy was evaluated by a Poisson regression model, and (3) the hazards of insemination and pregnancy were evaluated with proportional hazards regression models whereas median days from calving to first insemination and to pregnancy were estimated by Kaplan-Meier method. Additionally, Ca concentration was assessed by linear regression models, and the associations of SCH-0 and SCH-7 with the odds for metritis, endometritis, subclinical ketosis, and culling were evaluated by logistic models. Calcium concentrations were similar at 0 and 7 DIM (2.40 vs. 2.41 mmol/L, respectively); they were higher in cows calving in fall than in summer (2.58 vs. 2.24 mmol/L), and they also were higher in primiparous than in multiparous cows (2.53 vs. 2.28 mmol/L, respectively). The proportion of cows having SCH-0 and SCH-7 was 27.3 and 39.3%, respectively. Fall-calving cows had lower odds for SCH-0 [odds ratio (OR) = 0.31, 95% confidence interval (CI) = 0.12-0.86] than summer-calving cows, multiparous cows had higher odds for SCH-0 (OR = 3.96, 95% CI = 1.09-14.39) than primiparous cows, and cows with prepartum BCS ≥3.00 had higher odds for SCH-0 (OR = 4.03, 95% CI = 1.17-13.89) than in cows with BCS <3.00. Conversely, parity and prepartum BCS were not important predictors for SCH-7. Surprisingly, SCH-0 was not a risk factor for SCH-7. Cows with SCH-0 had lower odds for P1AI (OR = 0.26, 95% CI = 0.07-0.99) than normocalcemic cows, given that P1AI was 14 versus 38%, respectively. The hazard of first service was not associated with SCH-0 (hazard ratio = 1.03, 95% CI = 0.63-1.70) but cows with SCH-0 had lower hazard of pregnancy (hazard ratio = 0.39, 95% CI = 0.16-0.98) and took 32 d longer to get pregnant (105 vs. 73) than normocalcemic cows. Conversely, SCH-7 was not associated with fertility. Finally, SCH-0 and SCH-7 were associated with the odds for subclinical ketosis and metritis, respectively. In conclusion, SCH-0 but not SCH-7 is associated with reduced fertility in a herd of grazing dairy cows, but both were associated with health status.

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Post partumSubclinical Hypocalcaemia and Effects on Ovarian Function and Uterine Involution in a Dairy Herd

Cited by 28 publications

References 0 publications

Effect of enhancement of uterine involution and earlier initiation of post-partum cyclicity on the reproductive performance of buffalo

Effect of enhancement of uterine involution and earlier initiation of post-partum cyclicity on the reproductive performance of buffalo

The Effect of Formulation and Amount of Potassium Fertilizer on Macromineral Concentration and Cation-Anion Difference in Tall Fescue

Associations of subclinical hypocalcemia with fertility in a herd of grazing dairy cows

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