Histological features of the endometrium, as assessed in biopsy samples, were related to Standardbred mare genotypes for transferrin, esterase (as a control) and equine leucocyte antigens (ELA). Pathological changes were found more frequently in each successively older age group of mares. Among mares aged 6-19 years, there were significant pathologic changes on first examination following an infertile breeding season for 46 of 90 (51%) of transferrin homozygotes and 50 of 146 (34%) of transferrin heterozygotes. The difference between the two groups was significant for the total data (chi 1(2) = 6.56, P = 0.010) and when the data were stratified for mare age at biopsy (chi 1(2) = 7.33, P = 0.0068). The effect of transferrin was similar in both trotters and pacers, especially for frequent genotypes commonly found in horses of both gaits. There was no effect of esterase and, in a smaller set of ELA-typed mares, no significant effect of ELA genotype on uterine biopsy category. Transferrin has a well-established microbiostatic and biocidal effect. Conceivably, heterozygotes for some combinations of transferrin variants could have a slower natural rate of endometrial deterioration than homozygotes.
|Number of pages||8|
|Journal||Journal of reproduction and fertility. Supplement|
|State||Published - 1991|
ASJC Scopus subject areas
- Medicine (all)