PDF(Pubmed)
Abstract：
Post-surgical reproductive performance following ovine caesarean section has not been well studied. To assess any direct effects of surgical delivery in the absence of confounders such as dystocia or underlying diseases, we studied elective surgery performed in healthy animals for teaching purposes. Four hundred and eleven paired breeding records following vaginal delivery (n = 233), elective caesarean section (n = 122), and subsequent further vaginal deliveries in animals with a history of one prior elective caesarean operation (n = 56) were evaluated retrospectively. The overall subsequent pregnancy rate was 95%. Multivariable statistical analyses did not reveal any significant influence of planned caesarean surgery on subsequent conception, stillbirth, perinatal lamb mortality, lamb birth weights, or the incidence of premature foetal death (mummification and abortion). A significantly higher number of mating attempts was, however, necessary. Also, a significant reduction in litter size was seen in the first pregnancy immediately following a surgical delivery in comparison to animals which had previously only delivered vaginally (p = 0.001), but litter size returned to pre-caesarean levels in further follow-up pregnancies in animals with a history of one elective caesarean section (p = 0.436). Subsequent long-term reproductive performance of sheep following elective caesarean section is thus excellent, and the results encourage retention for breeding.
摘要：
绵羊剖腹产后的手术后生殖表现尚未得到很好的研究。评估在不存在难产或潜在疾病等混杂因素的情况下手术分娩的任何直接影响，出于教学目的，我们研究了在健康动物中进行的择期手术。阴道分娩后有四百一十一条配对的繁殖记录（n=233），选择性剖腹产（n=122），对既往有一次选择性剖腹产手术史的动物(n=56)进行了回顾性评估,并对随后进一步的阴道分娩进行了评估.随后的总体妊娠率为95％。多变量统计分析未显示计划剖腹产手术对后续受孕的任何显著影响，死产,围产期羔羊死亡率，羔羊出生体重,或胎儿过早死亡（木乃伊化和流产）的发生率。交配尝试的数量要高得多，然而,必要的。此外，与以前仅通过阴道分娩的动物相比，在手术分娩后的第一次妊娠中发现产仔数显着减少（p=0.001），但在有一次选择性剖腹产史的动物中,在进一步随访妊娠时,产仔数恢复至剖腹产前水平(p=0.436).因此，选择性剖腹产后绵羊的长期繁殖表现优异，结果鼓励保留繁殖。
