2021
DOI: 10.3168/jds.2020-18828
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Prevalence and risk factors related to anovular phenotypes in dairy cows

Abstract: The objective of the current study was to evaluate the relationship of body condition score (BCS) at 35 d in milk (DIM), milk production, diseases, and duration of the dry period with prevalence of anovulation at 49 DIM and then, specifically, with the prevalence of each anovular phenotype. We hypothesized that anovular follicular phenotypes, classified based on maximal size of the anovular follicle, have different etiologies. A total of 942 lactating Holstein cows (357 primiparous and 585 multiparous) from 1 … Show more

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Cited by 16 publications
(11 citation statements)
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“…Return to cyclicity during the postpartum period is critical for the success of reproductive programs, and the nutrition and management during the transition period is a critical determinant of time to first ovulation. Anovulation at~60 DIM can range from 5 to 45% in different dairy herds [139] and is greater in cows that have a greater incidence of health problems and cows losing excessive BCS during the postpartum period [133,135,140]. For example, one recent study by [140] evaluated 943 Holstein cows during the postpartum period and reported that, at 50 DIM, a 17.9% prevalence of anovulation in healthy cows (38.4% of the cows) as compared with 29.8% prevalence in cows with one disease (33.7% of the cows) and 39.5% prevalence in those that had more than one disease (27.9% of the cows).…”
Section: Importance Of the Transition Period On Subsequent Fertilitymentioning
confidence: 99%
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“…Return to cyclicity during the postpartum period is critical for the success of reproductive programs, and the nutrition and management during the transition period is a critical determinant of time to first ovulation. Anovulation at~60 DIM can range from 5 to 45% in different dairy herds [139] and is greater in cows that have a greater incidence of health problems and cows losing excessive BCS during the postpartum period [133,135,140]. For example, one recent study by [140] evaluated 943 Holstein cows during the postpartum period and reported that, at 50 DIM, a 17.9% prevalence of anovulation in healthy cows (38.4% of the cows) as compared with 29.8% prevalence in cows with one disease (33.7% of the cows) and 39.5% prevalence in those that had more than one disease (27.9% of the cows).…”
Section: Importance Of the Transition Period On Subsequent Fertilitymentioning
confidence: 99%
“…Anovulation at~60 DIM can range from 5 to 45% in different dairy herds [139] and is greater in cows that have a greater incidence of health problems and cows losing excessive BCS during the postpartum period [133,135,140]. For example, one recent study by [140] evaluated 943 Holstein cows during the postpartum period and reported that, at 50 DIM, a 17.9% prevalence of anovulation in healthy cows (38.4% of the cows) as compared with 29.8% prevalence in cows with one disease (33.7% of the cows) and 39.5% prevalence in those that had more than one disease (27.9% of the cows). As in many dairy herds, most (~60%) cows had at least one health problem in this study.…”
Section: Importance Of the Transition Period On Subsequent Fertilitymentioning
confidence: 99%
“…We found that cows diagnosed with two or more diseases before 50 ± 3 DIM were more likely to be diagnosed with UDE than cows with no disease recorded. The presence of multiple adverse health events early in lactation has been linked by other authors to poor reproductive and productive performance, including prolonged postpartum anovulation, reduced pregnancy rates and reduced milk production 21–24 . Postpartum dairy cattle commonly suffer from poor immunocompetence and systemic inflammation, and the presence of infectious and/or metabolic diseases in the postpartum period has been shown to further challenge the cow's immune system by causing impaired leukocyte function and dysfunctional or unregulated inflammatory responses 44,45 .…”
Section: Discussionmentioning
confidence: 99%
“…17 Some of the postpartum diseases identified as contributing to the development of RTD are hypocalcaemia, 18 hyperketonaemia, 19 retained fetal membranes (RFM) 16,17 and metritis. 14,20 The compounding negative impact of developing multiple diseases in the postpartum period has been investigated for outcomes including milk production, 21 probability of pregnancy, 21 ovarian activity 22 and culling risk, 23,24 but not for the risk of developing RTD specifically. Extrinsic factors such as season, 24,25 farm environment 26 and calving factors (e.g., stillbirth or dystocia) 17 have also been shown to contribute to the development of RTD.…”
Section: Introductionmentioning
confidence: 99%
“…During the periparturient transition period, dairy cows are subjected to a variety of metabolic and physiological changes that affect productivity, health and future reproductive performance. Despite tight homeostatic controls and homeorhetic adjustments to cope with the changes in metabolism, a high prevalence of calving-related disorders and metabolic or infectious diseases is not uncommon, with 45–71% of dairy cows across different levels of milk production, breeds and management systems affected [ 2 , 3 , 4 , 5 , 6 , 7 ]. Compromised postpartum health has a negative effect on the performance and survival of dairy cows.…”
Section: Introductionmentioning
confidence: 99%