Correlação da morfologia espermática com a taxa de concepção no uso de inseminação artificial em equinos

Abstract

Equines were primarily selected for skills and phenotypic characteristics and this contributed to lower fertility among these animals. The evaluation of sperm morphology is the component of the spermogram that best correlates with the fertility of the stallion. Currently, the reproduction biotechniques have been optimizing the distribution of genetic material over long distances, however, it also faces challenges regarding the seminal quality of an important portion of stallions. Aiming to better understand the aspects of stallion fertility, in this work we interpret and analyze the reflection on sperm morphology and correlate it with the conception rate of inseminated females. Using the wet preparation technique and phase contrast microscopy, 200 cells were counted per semen sample. In the Pearson Test, we were unable to reach high cognitive ability associated with statistical significance, signaling the need for a larger number of participating animals/samples. The results found relate to correlated morphological defects, such as: proximal droplets and distal droplets, pathological tailless heads and tailless heads, and finally, alteration in the correlated acrosome such as head changes such as narrow, giant, small, short broad and large. Two stallions showed high fertility and a high percentage of morphological defects in the semen, which can be explained by the presence of compensable defects.