In vitro sperm penetration speed and its relationship with in vivo bull fertility.

The in vitro tests utilized to evaluate sperm quality represent an interesting and important approach to evaluate ejaculated fecundant capacity. In the present work, the oocyte-penetrating ability of sperm from two bulls with low and two with high in vivo fertility rate was investigated. Sperm-quality parameters, such as sperm concentration, total and… CONTINUE READING