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- W4210707380 abstract "An inadequate uterine involution can lead to postpartal disorders in sows and thereby negatively affects the reproductive cycle and performance of the animals. Therefore, the aim of the study was to evaluate the influence of the farrowing process and different sow and piglet traits on the uterine involution in a free farrowing system. In total three data sets of 48 crossbred sows (Large White x Landrace) from the peripartal period were synthesised and analysed. The uterine diameter of three uterine horns per sow was measured daily during the first two weeks postpartum using ultrasonography and then the uterine regression was calculated. Furthermore, the following sow and piglet traits before and during parturition were assessed: parity, body condition score, backfat thickness, gestation length, number of live born piglets, number of stillborn piglets, farrowing duration, duration of placenta expulsion, litter weight, placenta weight, number of placenta parts, faecal score, and birth induction. In addition, the following parameters were recorded five days after farrowing: body temperature, severity and amount of vaginal discharge, pathological colour of vaginal discharge, and lack of appetite. Spearman's correlation test was used to examine the association between the parameters within the group and uterine regression. In addition, a linear multiple regression was used to model the relationship between the uterine involution and explanatory variables from the peripartal period. The mean diameter of the uterus decreased from 32.5 mm on day 2 post-partum to 11.4 mm on day 12 post-partum, which is a relative regression of 66%. In the linear multiple regression model, a significant influence of the body condition score (p = 0.046) and the presence of high body temperature (p = 0.022) on uterine involution was detected. When the BCS increases by one unit (from BCS 3 to 4), the relative regression of the uterine involution decreases by approximately 8% and when fever is present, uterine involution is almost 6% slower. Furthermore, a significant correlation between the gestation length and the uterine involution (r = 0.31; p = 0.035) was identified. However, no correlation between the farrowing process and piglets' traits on the uterine involution was detected. This study showed that the body condition score, the gestation length and fever in the first five days after farrowing had significant effects on uterine involution in sows in a free farrowing system. Therefore, these parameters should be routinely monitored in the farrowing management to assess reproductive health post-partum and warrant early intervention." @default.
- W4210707380 created "2022-02-08" @default.
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- W4210707380 date "2022-04-01" @default.
- W4210707380 modified "2023-10-16" @default.
- W4210707380 title "Influence of the farrowing process and different sow and piglet traits on uterine involution in a free farrowing system" @default.
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- W4210707380 doi "https://doi.org/10.1016/j.theriogenology.2022.01.028" @default.
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