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Effects of increased ambient temperature on semen quality have been widely reported. In one study, ambient temperatures of 40 °C at a relative humidity of 35–45% for 12 hours reduced semen quality [27]. Furthermore, B. taurus bulls are more susceptible than B. indicus bulls to high ambient temperatures [27]. In that regard, decreases in semen quality were less severe, occurred later, and recovered more rapidly in crossbred (B. indicus × B. taurus) bulls than in purebred B. taurus bulls exposed to high ambient temperatures [28].