Oestrous intensity is positively associated with reproductive outcome in high-producing dairy cows

García, E.; Hultgren, Jan; Fällman, Pontus; Geust, Johanna; Algers, Bo; Stilwell, George; Gunnarsson, Stefan; Rodriguez‐Martinez, Heriberto

doi:10.1016/j.livsci.2011.01.004

Cited by 16 publications

(18 citation statements)

References 14 publications

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“…An increasing relationship between OI (one to five) and CR (24-54%) was found (Figure 4). This finding is in agreement with Garcia et al (2011), who reported higher pregnancy and calving rates with a more intensive oestrus. There was a marked increase in CR between scores two and three (28% and 40%), where score two was based on oestruses with only local and secondary symptoms, such as anxiety, and score three Table 3.…”

Section: Discussionsupporting

confidence: 92%

A longitudinal study of oestrous characteristics and conception in tie-stalled and loose-housed Swedish dairy cows

Nyman

Malm

Gustafsson

et al. 2016

Acta Agriculturae Scandinavica, Section A — Animal Science

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The presence and importance of visual oestrous symptoms and the relation to conception, breed, housing system and milk yield were studied. Data were collected from a Swedish research herd during a 16-year period. Local, secondary and primary oestrous symptoms and an overall oestrus intensity score (OI) were studied. Decreasing trends in oestrous expression and conception rates (CR), and an increase in CR with more intensive oestrus, from 24% at OI score one (very week) to 54% at OI score five (very strong) were observed. The mean interval from first to last observed oestrus symptom was long with a large variation (54 ± SD = 32 h). Generally, irrespectively of housing system, Swedish Red cows had higher CR, more intensive oestruses and longer oestrus durations compared to Swedish Holstein cows. Local oestrous symptoms, with CR of 24-28%, were most frequently detected, which is why more attention should be paid to local oestrous symptoms.ARTICLE HISTORY

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Section: Discussionsupporting

confidence: 92%

A longitudinal study of oestrous characteristics and conception in tie-stalled and loose-housed Swedish dairy cows

Nyman

Malm

Gustafsson

et al. 2016

Acta Agriculturae Scandinavica, Section A — Animal Science

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“…To overcome this problem, cervix needs to *Corresponding author:-E-mail: nazmun_naher_bau@yahoo.com be relaxed to allow deeper penetration by the inseminating pipette through the cervical folds (Leethongdee, 2011) or the cervix can be bypassed through laparoscopic artificial insemination (LAPAI) (Hiwas et al, 2009). Intensity of oestrus and Vaginal Electrical Resistance (VER) are considered as important factors influencing pregnancy rate (Kozdrowski et al, 2006;Garcia et al, 2011). The main objectives of this study were to develop the TCAI through increasing cervical penetration depth and improve LAPAI to increase pregnancy rate, and to determine effects of induced oestrus intensity and vaginal electrical resistance (VER) on pregnancy rate of indigenous ewes using AI with frozen semen.…”

Section: Introductionmentioning

confidence: 99%

Factors influencing the pregnancy rate in indigenous ewes following AI using frozen semen

et al. 2018

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Study was conducted to observe the influence of different factors on pregnancy rate in 24 indigenous ewes following artificial insemination (AI) with frozen semen. The ewes were synchronized by intra-muscular injection of Prostaglandin F2α (Ovuprost ® Bayer, New Zealand). The onset and intensity of oestrus were determined by oestrus behaviour of ewes with vasectomized ram. VER values were measured immediately before AI using electrical heat detector (DRAMINSKI ® , Owocowa 17, Poland). Twelve ewes were inseminated trans-cervically and 12 laparoscopically. Five ewes were treated with Misoprostol (Cytomis ® 200 µg tablet; Incepta Pharmaceuticals Ltd. Bangladesh) to relax the cervix 12 hours before TCAI, and cervical penetration depth was measured by a steel rod. Pregnancy was confirmed by ultrasonography at 40 -45 days after AI. Cervical penetration depth was significantly increased (P<0.05) (0.48 ± 0.04 vs. 3.52 ± 0.17 cm) in treatment group. The pregnancy rate tended to be higher in treatment group (60.0 vs. 28.6%). In treatment group cervical penetration was significantly increased (P<0.05) (0.35 ± 0.08 vs. 3.52 ± 0.17 cm) immediately before AI compared with before oestrus synchronization. The pregnancy rate was significantly higher (P<0.05) (75.0 vs. 28.6%) in LAPAI than TCAI without treatment. The pregnancy rate tended to be higher (75.0 vs. 55.6%) in ewes with high oestrus intensity than in those with medium intensity. The pregnancy rate was significantly higher (P<0.05 : 70.0 vs. 20.0%) in lower VER group (230 -280 Ω) compared with higher VER group (331 -380 Ω.) Although LAPAI was superior to TCAI, TCAI in ewes treated with misoprostol giving a pregnancy rate of 60% could be acceptable, until the LAPAI could be made simpler to be used in field. The oestrus intensity and low VER values could be used to select ewes to be inseminated to increase the pregnancy rate.

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“…Lameness also decreases fertility (Alawneh et al, 2011;Morris et al, 2011) with the odds of pregnancy being reduced 5.1 times and that of calving reduced 3.5 times (Garcia et al, 2011).…”

Section: Impact Of Lameness Mastitis Metabolic and Reproductive Dismentioning

confidence: 99%

Scientific Opinion on the assessment of dairy cow welfare in small‐scale farming systems

2015

EFS2

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This opinion reviews information on small-scale dairy cow farming systems in Europe, including the impact of production diseases on welfare of cows, and proposes a methodology for welfare assessment in those systems. To address specific expectations of consumers that food be produced locally or regionally or maintaining acceptable animal welfare conditions, in addition to herd size, criteria to define farms as "non-conventional" were proposed. Several sources were investigated for identifying criteria for the description and categorisation of small-scale farms, including dairy umbrella organisations and literature. In addition to herd size (up to 75 cows), proposed criteria related to small-scale farming comprise the workforce source, input level, indigenous breed use and production type certification. To cover the large diversity of farming systems across Europe, it was proposed that farms meeting at least two of these criteria be considered non-conventional. To adapt the welfare assessment to small-scale farms, the same risk factors and welfare consequences, as measured by corresponding animalbased measures identified in previous opinions for intensive farming systems were considered to be also relevant for small-scale systems. In addition, factors related to resources provided on pasture (e.g. shelter), management of pasture (e.g. mixing herds) and management of the cows (e.g. use of local breeds) were considered more likely to be present in small-scale systems. An on-farm survey was run to collect data for welfare assessment from 124 European farms. The distribution of risk factors and animal-based measures varied across the full range in study farms and showed similar patterns in farms with different grazing systems (from no time to full year on pasture). The animal-based measures identified for intensive farming are well suited for application in smallscale dairy farms. Production disease impact on the individual animal's welfare state does not depend on herd size or farming system.

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Oestrous intensity is positively associated with reproductive outcome in high-producing dairy cows

Cited by 16 publications

References 14 publications

A longitudinal study of oestrous characteristics and conception in tie-stalled and loose-housed Swedish dairy cows

A longitudinal study of oestrous characteristics and conception in tie-stalled and loose-housed Swedish dairy cows

Factors influencing the pregnancy rate in indigenous ewes following AI using frozen semen

Scientific Opinion on the assessment of dairy cow welfare in small‐scale farming systems

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