Factors affecting the occurrence of postpartum prolonged luteal activity in clinically healthy high-producing dairy cows

Kafi, M.; Mirzaei, Abdolah; Tamadon, Amin; Saeb, M.

doi:10.1016/j.theriogenology.2011.08.016

Cited by 18 publications

(12 citation statements)

References 48 publications

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“…However, the CL did not regress in the remaining cows, and the mechanism determining the fate of the CL remained unclear [ 52 ]. The serum concentrations of P 4 in cows with PLP were higher than in those with normal ovarian activity, indicating that the occurrence of PLP in the clinically healthy high-producing dairy cows was not associated with uterine infection [ 53 ].…”

Section: Discussionmentioning

confidence: 99%

Persistence of uterine bacterial infection, and its associations with endometritis and ovarian function in postpartum dairy cows

Ghanem

Tezuka

Devkota

et al. 2015

Journal of Reproduction and Development

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We investigated the relationship between the persistence of uterine bacterial infections with cytologically determined endometritis and ovarian function in 65 postpartum Holstein cows. Vaginal mucus discharges were collected, and endometrial smear samples (n = 130) were collected for cytological and bacteriological examinations from the cows at weeks 5 and 7 postpartum (pp). Blood samples were collected at weeks 3, 5 and 7 pp to determine plasma progesterone concentrations to monitor ovarian activity. According to the bacteriological examination, cows were classified into four groups. The first group (n = 32; 49%) comprised cows negative for bacteria at weeks 5 and 7 pp. The second group (n = 11; 17%) comprised cows with bacterial infections at week 5 pp but that were clear of infection at week 7 pp. The third group (n = 12; 19%) comprised cows without bacteria at week 5 pp but that acquired an infection by week 7 pp. The fourth group (n = 10; 15%) comprised cows with bacterial infections at weeks 5 and 7 pp (persistence of infection). A positive correlation (P < 0.001) was noted between the severity of cytologically determined endometritis, purulent vaginal discharge and the persistence of infection. Cows with persistent infections had a significantly (P < 0.01) prolonged luteal phase compared with cows without infection. In conclusion, the prevalence of cytologically determined endometritis and prolonged luteal phase were significantly increased in cows with persistent infections.

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Section: Discussionmentioning

confidence: 99%

Persistence of uterine bacterial infection, and its associations with endometritis and ovarian function in postpartum dairy cows

Ghanem

Tezuka

Devkota

et al. 2015

Journal of Reproduction and Development

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“…Delayed return to normal ovarian cyclicity, reduced heat expression, and poor conception rates are commonly implicated in this trend (Dobson et al, 2007;Walsh et al, 2011). The effect of increased level of production in reducing the time and intensity of estrus expression has been well documented (Lopez et al, 2004); an association between increasing milk yield and an increase in the incidence of abnormal ovarian cycles (particularly prolonged luteal phases) has also been shown (Kafi et al, 2012). It is plausible that production may have an effect on ISI length.…”

Section: Introductionmentioning

confidence: 99%

Variation in the interservice intervals of dairy cows in the United Kingdom

Remnant

Green

Huxley

et al. 2015

Journal of Dairy Science

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An understanding of the normal estrous-cycle length of the cow is important when managing and monitoring dairy-herd fertility. Although the normal interovulatory interval is widely considered to be 21 d, some studies have found alternative intervals to be more prevalent; previously, most of the variation in interval length was expected to be between cows. The aim of this study was to assess the time between inseminations (interservice interval, ISI) in a large number of dairy cows and to explore possible associations between cow factors and estrous-cycle length. The study used ISI data from 42,252 cows in 159 herds across England and Wales. Univariate analysis of the subset of 114,572 intervals between 15 and 30 d (a range covering the increased frequency of ISI occurring at the expected time of the first return to estrus) following an insemination revealed a modal ISI of 22d. Primiparous heifers had a modal ISI of 21 d. Significant differences existed between the distribution of ISI for different yield groups, parity numbers, and the number of inseminations. Multilevel regression modeling was used to evaluate the associations between cow factors and ISI, while accounting for clustering at the herd and cow level. This revealed significant associations between predicted ISI and insemination number, days in milk, lactation 305-d milk yield, and month and year of insemination. Variance partition coefficients indicated that only 1% of variation in ISI was at the herd level, 12% at the animal level, and 87% at the insemination level, indicating that cycle length varies substantially more between cycles within a cow than between cows or herds. These findings suggest the normal range of ISI for modern UK dairy cows is longer than expected and cycle length has a large amount of unexplained variation within individual animals over time.

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“…; Kafi et al. ). The described weakness for these variables reflects the difficulties that may arise while performing field studies in developing countries, but still there is a relevance of such studies for the improvement of animal production.…”

Section: Discussionmentioning

confidence: 98%

“…Pregnancy status was however not determined, indicating that more cows in the open grazing system probably should have been favourably classified with 'normal' P4 profile. Early post-partum ovulation is generally associated with improved uterine health and fertility, but for a few individuals, it may be a risk factor for prolonged luteal activity because of incapacity of the endometrium to synthesize prostaglandins for luteolysis, due to subclinical or clinical uterine ill-health (Ranasinghe et al 2011;Kafi et al 2012). The described weakness for these variables reflects the difficulties that may arise while performing field studies in developing countries, but still there is a relevance of such studies for the improvement of animal production.…”

Section: Discussionmentioning

confidence: 99%

Husbandry Factors and the Resumption of Luteal Activity in Open and Zero‐Grazed Dairy Cows in Urban and Peri‐Urban Kampala, Uganda

Kanyima

Båge

Owiny

et al. 2014

Reprod Domestic Animals

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ContentsThe study investigated the influence of selected husbandry factors on interval to resumption of post-partum cyclicity among dairy cows in urban and peri-urban Kampala. A prospective study of 85 day post-partum period of 59 dairy cows in open (n = 38) and zero grazing (n = 21) systems was conducted on 24 farms. Cows of parity 1–6 were recruited starting 15–30 days post-partum. Progesterone (P4) content in milk taken at 10–12 day intervals was analysed using ELISA. The cow P4 profiles were classified into ‘normal’ (< 56 days), ‘delayed’ (> 56 days), ‘ceased’ or ‘prolonged’ (if started < 56 days but with abnormal P4 displays) resumption of luteal activity and tested for association with husbandry and cow factors. Of the 59 cows, luteal activity in 81.4% resumed normally and in 18.6%, delayed. Only 23.7% maintained regular luteal activity, while the others had ceased (10.2%), prolonged (37.3%) or unclear luteal activity (20.3%). There were no differences between open and zero-grazed cows. Milk production was higher (p < 0.05) in zero than open grazing, in urban than peri-urban and in cows fed on brew waste (p < 0.001) compared with mill products and banana peels. Results suggest that luteal activity resumes normally in a majority of cows, although only a minority experienced continued normal cyclicity once ovulation had occurred, in the two farming systems irrespective of feed supplements or water, and that supplementing with brew waste is beneficial for milk production.

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Factors affecting the occurrence of postpartum prolonged luteal activity in clinically healthy high-producing dairy cows

Cited by 18 publications

References 48 publications

Persistence of uterine bacterial infection, and its associations with endometritis and ovarian function in postpartum dairy cows

Persistence of uterine bacterial infection, and its associations with endometritis and ovarian function in postpartum dairy cows

Variation in the interservice intervals of dairy cows in the United Kingdom

Husbandry Factors and the Resumption of Luteal Activity in Open and Zero‐Grazed Dairy Cows in Urban and Peri‐Urban Kampala, Uganda

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