title: The new Society for Theriogenology breeding soundness evaluation system.
abstract: In 1993, The Society for Theriogenology published revised standards for breeding soundness evaluation of bulls. These revised standards replaced the old semen score format with minimum acceptable scores for scrotal circumference (varies with age), motility (30% or fair), and morphology (70%).
authors.affiliation: Department of Large Animal Clinical Science, University of Tennessee, Knoxville, USA.
authors.forename: F M
authors.initials: FM
authors.lastname: Hopkins
authors.forename: J C
authors.initials: JC
authors.lastname: Spitzer
mesh_terms: D000818:Animals; D001947:Breeding / Q000592:standards*; D002417:Cattle / Q000502:physiology*; D008297:Male; D012661:Semen / Q000502:physiology