Fertility disorders and subsequent fertility in dairy cattle

Ouweltjes, W.; Smolders, E.A.A.; Elving, L.; Eldik, P. van; Schukken, Y.H.

doi:10.1016/s0301-6226(96)01392-9

Cited by 21 publications

(19 citation statements)

References 24 publications

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“…Heritabilities were very low for MET (0.02 to 0.03); relatively higher for RP (0.07 to 0.08) and MF (0.16 to 0.18). This was in agreement with the result reported by Ouweltjes et al (1996), Koeck et al (2010) and Heringstad (2010) for MET, and Heringstad et al (2005), Heringstad (2010) and Koeck et al (2010) for RP. Some studies found higher estimates for the heritability of MF (up to 0.4; Lin et al, 1989), but these studies generally used data from later lactations for variance components estimation.…”

Section: Codsupporting

confidence: 94%

Genetic parameters for producer-recorded health data in Canadian Holstein cattle

Neuenschwander

Miglior

Jamrozik

et al. 2012

Animal

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Health traits are of paramount importance for economic dairy production. Improvement in liability to diseases has been made with better management practices, but genetic aspects of health traits have received less attention. Dairy producers in Canada have been recording eight health traits (mastitis (MAST), lameness (LAME), cystic ovarian disease (COD), left displaced abomasum (LDA), ketosis (KET), metritis (MET), milk fever (MF) and retained placenta (RP)) since April 2007. Genetic analyses of these traits were carried out in this study for the Holstein breed. Edits on herd distributions of recorded diseases were applied to the data to ensure a sufficient quality of recording. Traits were analysed either individually (MAST, LAME, COD) or were grouped according to biological similarities (LDA and KET, and MET, MF and RP) and analysed with multiple-trait models. Data included 46 104 cases of any of the above diseases. Incidence ranged from 2.3% for MF to 9.7% for MAST. MET and KET also had an incidence below 4.0%. Variance components were estimated using four different sire threshold models. The differences between models resulted from the inclusion of days at risk (DAR) and a cow effect, in addition to herd, parity and sire effects. Models were compared using mean squared error statistic. Mean squared error favoured, in general, the sire and cow within sire model with regression on DAR included. Heritabilities on the liability scale were between 0.02 (MET) and 0.21 (LDA). There was a moderate, positive genetic correlation between LDA and KET (0.58), and between MET and RP (0.79).

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Section: Codsupporting

confidence: 94%

Genetic parameters for producer-recorded health data in Canadian Holstein cattle

Neuenschwander

Miglior

Jamrozik

et al. 2012

Animal

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“…Retained placenta has been suggested to reduce fertility in two ways: first, by a direct effect through an unknown mechanism and secondly, by an indirect effect through endometritis (Stevenson & Call, 1988;Laven & Peters, 1996). Han & Kim (2005) reported the intervals from calving to first service and conception were higher in the retained placenta group than in the control group, which is consistent with other reports (Ouweltjes et al, 1996). In some studies, however, the intervals from calving to first service and/or conception were not related to the occurrence of retained placenta (Coleman et al, 1985;Kaneko et al, 1997).…”

Section: Retained Placenta and Metritissupporting

confidence: 74%

Effects of main reproductive and health problems on the performance of dairy cows: a review

Hossein-Zadeh

2013

Span. j. agric. res.

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Reproductive efficiency is a critical component of a successful dairy operation and acts as an important component of a profitable dairy farm, whereas reproductive inefficiency is one of the most costly problems facing the dairy industry today. Reproductive problems occur frequently in lactating dairy cows and can dramatically affect reproductive efficiency in a dairy herd. Some of the most common problems include twinning, dystocia, abortion, stillbirth, retained placenta and metritis. These are diverse disorders that are similar in that they all can result in impaired reproductive function. Deciding whether to breed, treat, or cull dairy cows exhibiting one or more of these reproductive problems is a challenge for both veterinarians and dairy producers. In addition, there is considerable controversy among dairy scientists and bovine practitioners regarding the economic impact of these problems in a dairy operation and the most effective management or therapeutic intervention for treating them. Because of this controversy, dairy managers should focus on prevention and control of risk factors associated with each problem rather than on prescriptive therapeutic interventions. Dairy producers should work closely with their herd veterinarian to develop such management strategies and discuss appropriate interventions when necessary (Fricke, 2001).Low fertility reduces the profit by decreasing the average milk production and the number of calves per cow per year. Poor reproductive performance is a major cause of involuntary culling and therefore reduces the AbstractThis review focuses on the potential effects of twinning, dystocia, stillbirth, abortion, retained placenta and metritis on the productive and reproductive performances in dairy cattle. These are diverse disorders that are similar in that they all can result in impaired performance of dairy cows. Reproductive problems occur frequently in lactating dairy cows and can dramatically affect reproductive efficiency in a dairy herd. Poor reproductive performance is a major cause of involuntary culling and therefore reduces the opportunity for voluntary culling and has a negative influence on the subsequent productivity of a dairy herd. Reproductive performance is influenced by the interactive effect of environment, management, health, and genetic factors. In addition, diseases mainly affect dairy cow productivity by decreasing reproductive efficiency, shortening the expected length of productive life and by lowering milk production. Deciding whether to breed, treat, or cull dairy cows showing one or more of these problems is a challenge for both veterinarians and dairy producers. In addition, there is considerable debate among dairy scientists and bovine practitioners regarding the economic impact of these problems in a dairy operation and the most effective management or therapeutic intervention for treating them. Because of this controversy, dairy managers should focus on prevention and control of risk factors associated with each problem rather than on prescr...

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“…This reproduction disorder has been associated with longer days to conception (Fourichon et al 2000). The effect of abortion on P/AI was possibly mediated by the occurrence of metritis and subsequently pyometra, which are associated with abortion (Ouweltjes et al 1996), and subsequently decrease reproductive performance in dairy herds. The causes of abortion were not determined.…”

Section: Risk Factorsmentioning

confidence: 99%

The effects of periparturient events, mastitis, lameness and ketosis on reproductive performance of Holstein cows in a hot environment

Mellado

García²,

Deras

et al. 2018

Austral j. vet. sci.

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ABSTRACT. The aim of this study was to determine the association among periparturient events such as mastitis, lameness (infectious and non-infectious) and ketosis and the reproductive performance of high producing Holstein cows in a hot environment. The health status and reproductive data variables were recorded from 6,566 completed lactations in a large dairy operation. A logistic regression model with the stepwise procedure was used, considering the occurrence of the health problems during the pre-breeding period as fixed effect risk factors and reproductive variables as dependent variables. Pregnancy rate of cows contracting clinical mastitis (CM) around the period of first inseminations was five percentage points lower than cows without this disease. Cows with CM shortly before or after the first service had twice the risk of requiring more than three services per pregnancy than cows with healthy udders. Cows experiencing abortion, laminitis or metritis were two times more likely to require >3 services per pregnancy than cows not experiencing these reproductive disorders. Cows experiencing lameness, mastitis and metritis presented a significantly longer interval between calving and pregnancy compared to healthy cows. Ketosis and lameness increased the odds of a cow of being inseminated for the first time after 70 days in milk. In conclusion, these results suggest that abortion, ketosis, CM, retained placenta (RP), metritis, and lameness are associated with decreased reproductive performance in high producing Holstein cows subjected to thermal stress.

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Fertility disorders and subsequent fertility in dairy cattle

Cited by 21 publications

References 24 publications

Genetic parameters for producer-recorded health data in Canadian Holstein cattle

Genetic parameters for producer-recorded health data in Canadian Holstein cattle

Effects of main reproductive and health problems on the performance of dairy cows: a review

The effects of periparturient events, mastitis, lameness and ketosis on reproductive performance of Holstein cows in a hot environment

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