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Embryonic recovery rates, up to five days after insemination, in mares with pathology of uterus and oviducts

Embryonic recovery rates, up to five days after insemination, in mares with pathology of uterus and oviducts

Revista Brasileira de Reproducao Animal 16(1-2): 63-71

The aim of this study was to investigate the influence of pathological processes in the uterus and oviduct on fertility. Seventy-seven mares were inseminated post-ovulation with frozen or fresh diluted semen with similar fertilization capacity (GASTAL, 1989). Shortly before artificial insemination (AI), a guarded uterine swab was collected for bacteriological and cytological examination. The mares were slaughtered within 1 to 5 days post AI. The oviducts ipsilateral to ovulation were flushed and material was collected from the uterus and oviducts for histopathological examination. No difference (P gt 0.05) was observed in the rates of recovery embryos in normal mares (51.7%) as compared to mares with problems as detected by bacteriological (37.5%), cytological (25.0%) and histological (27.3%) uterine examinations. Regressive and inflammatory oviduct abnormalities were founding 10.4% and 5.2% of the mares examined, respectively. The percent age of embryos collected from mares with oviduct abnormalities (25.0%) was similar statistically (P gt 0.05) to that from normal mares (51.7%). In spite of the absence of a significant difference, when the data on all problem mares was combined, the embryo recovery rate was lower (30.9%) than in the normal mares as detected by the diagnostic methods used in the present study. It also was demonstrated, that the equine oviduct frequently can be attacked by regressive abnormalities in spite of the absence of macroscopic or clinical symptoms.

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Accession: 008598674

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