Suitability of the intact acrosome method for the prediction of fertility in bovine artificial insemination.

The average percentages of sperm with intact acrosomes in eight batches of frozen-thawed semen from each of 17 bulls were compared with the non-return rates to artificial insemination by these bulls achieved over a period of three years. Despite the fact that the bulls could be categorised into three statistically significantly different groups according to their non-return rates, there was no significant correlation between the percentage of intact acrosomes and the non-return rates of the 17 bulls.