Certain Semen Characteristics and their Relation to the Reproductive Performance of a Purebred Hereford Herd1

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Abstract
AS the use of artificial insemination has increased, it has been necessary to develop methods to test the potential fertility of semen. A number of tests have been developed, but none of them is entirely accurate in predicting fertility. Buckner et al. (1954), Lasley and Bogart (1943), Lasley (1951), Erb et al. (1950), and Branton et al. (1951) used motility of semen to indicate potential fertility of semen. Ehlers and Erb (1950) found that the ability to maintain motility after storage was a better measure of fertility than initial motility. The correlations between volume per ejaculate and fertility have varied from high positive (Lasley and Bogart, 1943) to negative ones (Mercier and Salisbury, 1946). Underbjerg et al. (1942) reported that stored semen, irrespective of treatment, showed a lower conception percentage as compared to fresh semen. Schultze et al. (1948) reported an average decline of 4.61% conception for each day of storage up to 4 days. Erb et al. (1950) reported a similar decline for 3 days. Copyright © . .

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