EFFECT OF SURGICAL TREATMENT IN RECTOVAGINAL INJURIES ON FERTILITY IN COWS

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FARHOUDI MOGHADAM M.; NOUROUZIAN I.; HOVARESHTI P.; BOLOURCHI M.; NADALIAN M.GH.

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Journal: Journal of Veterinary Research Year:2001 | Volume:56 | Issue:4 Page(s): 31-39

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Title

EFFECT OF SURGICAL TREATMENT IN RECTOVAGINAL INJURIES ON FERTILITY IN COWS

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Keywords

COWQ3

RECTOVAGINAL INJURIESQ4

FERTILITYQ2

SURGICAL TREATMENTQ3

Abstract

Rectovaginal injuries can result in subsequent infertility in COW. In a retrospective study, records of 147 Holstein COWs with evidence of RECTOVAGINAL INJURIES were reviewed to determine their effects on FERTILITY. This study was conducted in a large dairy (typical herd size 1420 COWs) in Tehran between the years 1993 and 1996. Period prevalence's were 0.4 % fistula, 1.9% laceration (third degree), 5.4 % pneumovagina, 1.5 % urovagina and 0.8 % mixed injuries. The highest occurrence was among first-calf heifers (66 %). Thirteen COWs repeated the same condition in the subsequent calving. Eighty seven first-calf heifers without the history of retained placenta were selected of which 73 COWs were considered as operated group, of which 61 cases (83.6 %) became pregnant. Of 14 unoperated controls, 11 COWs (78.6 %) became pregnant. Pregnancy percentage in delaye-operated group decreased gradually (in days 1-45, 46-90, 91-120 and> 120 were 85.9, 82.4, 75 and 73.7 % respectively). It was concluded that RECTOVAGINAL INJURIES had a negative effect on reproductive performance of the COWs. Comparison between operated and unoperated first-calf heifers showed significant increases in the number of days to first service (228.6 vs 164.5 days), number of days open (131.1 vs 93.4 days) and the calving interval (476.8 vs 409.9 days) (p<0.05), and slight decreases in the number of services per conception (3.20 vs 3.27) and the culling rate (16.4 % vs 21.4 %). The pregnancy rate increased in the operated COWs (31.3 % vs 30.6 %). However, they were not statistically significant. Further analysis of the data revealed that performing surgery prior to the day 45 postpartum was much more beneficial than that of after day 45, and this affected the reproductive indices (DFS: 99.7 vs 142.8 days, CI:428 vs 459.9days) (P<0.05), (S/C:3.06 vs 3.27, PR:32.7 % vs 30.6 %, culling rate:15 % vs 17 %). Milk yields (305 days lactation) were not significantly altered between the two groups. In conclusion, to prevent financial losses due to RECTOVAGINAL INJURIES in dairy herds, one should consider: 1) Proper handling of the dystocia, 2) Performing surgical approach on time, preferable before 45 days postpartum, to obtain better FERTILITY indices.

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APA: Copy

FARHOUDI MOGHADAM, M., NOUROUZIAN, I., HOVARESHTI, P., BOLOURCHI, M., & NADALIAN, M.GH.. (2001). EFFECT OF SURGICAL TREATMENT IN RECTOVAGINAL INJURIES ON FERTILITY IN COWS. JOURNAL OF VETERINARY RESEARCH, 56(4), 31-39. SID. https://sid.ir/paper/35543/en

Vancouver: Copy

FARHOUDI MOGHADAM M., NOUROUZIAN I., HOVARESHTI P., BOLOURCHI M., NADALIAN M.GH.. EFFECT OF SURGICAL TREATMENT IN RECTOVAGINAL INJURIES ON FERTILITY IN COWS. JOURNAL OF VETERINARY RESEARCH[Internet]. 2001;56(4):31-39. Available from: https://sid.ir/paper/35543/en

IEEE: Copy

M. FARHOUDI MOGHADAM, I. NOUROUZIAN, P. HOVARESHTI, M. BOLOURCHI, and M.GH. NADALIAN, “EFFECT OF SURGICAL TREATMENT IN RECTOVAGINAL INJURIES ON FERTILITY IN COWS,” JOURNAL OF VETERINARY RESEARCH, vol. 56, no. 4, pp. 31–39, 2001, [Online]. Available: https://sid.ir/paper/35543/en

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