title: Fine structural abnormalities of spermatozoa from a subfertile bull: a case report.
abstract: Spermatozoa from a nine-year-old subfertile Holstein bull were evaluated by light and electron microscopy. Morphological abnormalities observed included cytoplasmic droplet-like structures, constriction of the midpiece, missing axial filaments and abnormal spermatozoal head shapes.
authors.affiliation: American Breeders Service Division, W. R. Grace & Co., DeForest, WI 53532, USA.
authors.forename: S P
authors.initials: SP
authors.lastname: Lorton
authors.forename: A S
authors.initials: AS
authors.lastname: Wu
authors.forename: M M
authors.initials: MM
authors.lastname: Pace
authors.forename: W G
authors.initials: WG
authors.lastname: Parker
authors.forename: J J
authors.initials: JJ
authors.lastname: Sullivan