Clinical significance of uterine biopsy results in the maiden and non-maiden mare
It was found that pregnancy is dependent on biopsy grade and age in both maiden and non-maiden mares. As age and biopsy grade increase, the pregnancy rate decreases in both maiden and non-maiden mares. The lower predicted probability of pregnancy for maiden, compared to non-maiden mares, may be explained by a higher incidence of non-uterine causes of infertility in the maiden group. Similarly, the predicted probability of embryonic mortality increases as biopsy grade and age-group increases. The correlation of more severe histological changes with increased age in maiden and non-maiden mares suggests that such changes occur independently from previous pregnancies.
J P. Held and Barton W. Rohrbach Dr.. "Clinical significance of uterine biopsy results in the maiden and non-maiden mare" Equine Reproduction V: Proceedings of the Fifth International Symposium on Equine Reproduction. (1991): 698-699.
This document is currently not available here.