Luís Fernando Faria Coury, C. Campos, G. Moraes, N. S. Reis, R. M. Santos
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The overall occurrences were 10.24% (82/801) of RP/ME, 12.86% for CE and 5.12% for RP/ME and CE. Most of normal calving cows had healthy puerperium (73.89%), whereas a majority of assisted calving cows had uterine disorders (74.29%). The number of AI per conception was similar for cows that had either normal or assisted calving (2.39±0.08 and 3.00±0.43, P = 0.16). There was no evidence of negative influence of calving type on the 150 PPD pregnancy rate of lactating crossbreed dairy cows (P = 0.44). Healthy cows had higher 150 PPD pregnancy rate than cows affected by puerperium uterine disorders (51.65 vs. 42.92%). Normal calving crossbred dairy cows had a healthier puerperium, compared to cows with assisted calving which were more susceptible to puerperium uterine disorders. 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引用次数: 0
摘要
摘要本研究旨在探讨产犊方式(正常产犊或辅助产犊)对产褥期子宫疾病发生及产后150 d人工授精次数(AI)和妊娠率的影响。观察奶牛的分娩过程,将产犊类型分为正常产犊和辅助产犊。正常产犊不需要人为干预,而辅助产犊需要通过阴道切除小牛。出生825例,死产7例(0.85%),双胞胎17例(2.06%)。我们分析了801例单胎,其中正常766例(95.63%),辅助35例(4.36%)。评估子宫疾病的发生情况,如保留胎盘合并子宫炎(PR/ME)和临床子宫内膜炎(CE)。总发生率为RP/ME 10.24% (82/801), CE 12.86%, RP/ME和CE 5.12%。正常产犊奶牛产褥期健康的占73.89%,辅助产犊奶牛子宫病变占74.29%。正常产犊和辅助产犊奶牛的人工智能(AI)数量基本相同(2.39±0.08和3.00±0.43,P = 0.16)。产犊类型对泌乳期杂交奶牛150 PPD妊娠率无负影响(P = 0.44)。健康奶牛150 PPD妊娠率高于产褥期子宫疾病奶牛(51.65% vs. 42.92%)。与辅助产犊的奶牛相比,正常产犊的杂交奶牛产褥期更健康,而辅助产犊的奶牛更容易患产褥期子宫疾病。健康产褥期的奶牛在产后150天的怀孕率更高。
Effect of assisted calving on uterine puerperal disorders occurrence, and on reproductive efficiency in crossbred dairy cows
Abstract The aim of this study was to evaluate the effect of the type of calving (normal or assisted) on the occurrence of puerperal uterine disorders and on the number of artificial inseminations (AI) per conception and pregnancy rate at 150 days postpartum (PPD). Cows were observed during parturition and the type of calving was classified as normal or assisted. Normal calving required no human interference, while assisted calving required a calf removal aid via vaginal access. There were 825 births, 7 stillbirths (0.85%) and 17 twins (2.06%). We analyzed 801 single births, from which 766 (95.63%) were normal and 35 (4.36%) assisted. Were evaluated the uterine disorders occurrence such as retained placenta combined with metritis (PR/ME) and clinical endometritis (CE). The overall occurrences were 10.24% (82/801) of RP/ME, 12.86% for CE and 5.12% for RP/ME and CE. Most of normal calving cows had healthy puerperium (73.89%), whereas a majority of assisted calving cows had uterine disorders (74.29%). The number of AI per conception was similar for cows that had either normal or assisted calving (2.39±0.08 and 3.00±0.43, P = 0.16). There was no evidence of negative influence of calving type on the 150 PPD pregnancy rate of lactating crossbreed dairy cows (P = 0.44). Healthy cows had higher 150 PPD pregnancy rate than cows affected by puerperium uterine disorders (51.65 vs. 42.92%). Normal calving crossbred dairy cows had a healthier puerperium, compared to cows with assisted calving which were more susceptible to puerperium uterine disorders. And cows with a health puerperium have a higher pregnancy rate at 150 days postpartum.