BULL LIBIDO SERVING CAPACITY

The fertility of a bull is influenced by a number of factors; however, the most important factor is his sex drive, or libido. This article d escribes methods used to assess bull sex drive and to determine repeat ability and relationships with fertility. An overview of factors that influence bull sex drive is given, such as genetics, age, sexual exper ience, and social interactions. Potential pitfalls in testing procedur es also are provided, as well as animal welfare guidelines and the sta tus of testing alternatives.