Effects of caesarean section, retained placenta and vaginal or uterine prolapse on subsequent fertility in beef cattle.
Effects of caesarean section, retained placenta and vaginal or uterine prolapse on subsequent fertility in beef cattle.
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剖腹产、胎盘保留和阴道或子宫脱垂对肉牛随后生育能力的影响。
DOI：
10.2527/jas1981.534916x
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发表时间：
1981
影响因子：
3.3
通讯作者：
P. Burfening
中科院分区：
文献类型：
--
作者：
D. Patterson;R. Bellows;P. Burfening
从1963年至1977年，在蒙大拿州迈尔斯市牲畜和牧场研究站收集的13，296头产犊的数据用于评价经历剖腹产、胎盘滞留或阴道或子宫脱垂的母鼠随后的生殖性能。从1963年到1977年，共进行了121次剖腹产（占所有产犊的0.9%），其中第一头产犊2岁和3岁母鼠的发生率最高。105只接受剖腹产的母鼠的秋季妊娠率为52.4%，比牛群平均值低26.6%（p <0.01）。49例自然分娩后胎膜仍保留。保留胎膜的母鼠的妊娠率没有显著改变（82.2% vs 79.4%）。共有153例产犊与生殖道脱垂相关，包括124例（81.0%）阴道脱垂和29例（19.0%）子宫脱垂。所有发生脱垂的母鼠的后续妊娠率均低于群体平均水平（p小于0.01）。经产和经产母体脱垂后的妊娠率分别为28.0%和57.9%。这些数据表明，剖腹产和阴道或子宫脱垂导致受影响母体的后续妊娠率显著降低，对保留胎膜的母体无不利影响。
Data collected at the Livestock and Range Research Station, Miles City, Montana, on 13,296 calving from the years 1963 through 1977 were used to evaluate subsequent reproductive performance of dams experiencing caesarean section, retained placenta or vaginal or uterine prolapse. A total of 121 caesarean sections (.9% of all calvings) was performed from 1963 through 1977, with the highest incidence reported among first-calf 2- and 3-year-old dams. Fall pregnancy rate among the 105 dams that had caesarean deliveries was 52.4%, which was 26.6% lower (p less than .01) than the herd average. Fetal membranes were retained after 49 natural parturitions. Pregnancy rates among dams retaining fetal membranes were not significantly altered (82.2 vs 79.4%). A total of 153 calvings was associated with prolapse of the reproductive tract, including 124 (81.0%) vaginal prolapses and 29 (19.0%) uterine prolapses. Subsequent pregnancy rate of all dams experiencing prolapse was lower (p less than .01) than the herd average. Pregnancy rates following prolapse among primiparous and multiparous dams were 28.0 and 57.9%, respectively. These data indicate that caesarean section and vaginal or uterine prolapse result in significant reductions in subsequent pregnancy rates of affected dams, with no detrimental effect on dams retaining fetal membranes.