An Entlebucher Mountain Dog (57 months old, case 1), a Labrador Retriever (24
months, case 2) and an Irish Soft-Coated Wheaten Terrier (31 months old, case 3)
were presented for breeding soundness evaluation to the clinic. During semen
collection in all 3 dogs, the pre-secretion and the sperm-rich fraction showed
normal consistency and colour, whereas the prostatic secretion (3 rd ejaculate
fraction) appeared strikingly yellow. In cases 1 and 2, a severely decreased
sperm motility (asthenozoospermia) and an increased amount of abnormal
spermatozoa (teratozoospermia), and in case 3, a moderately decreased total
sperm count (oligozoospermia) were detected. Sonographical examination revealed
abnormal findings regarding the uretero-vesical junction and ectopic ureters.
Therefore it is concluded that urine admixture to the 3 rd ejaculate fraction
may indicate the presence of ectopic ureters and may cause impairment of semen
quality and fertility. The present cases raise questions regarding urospermia
concerning: 1. its incidence in dogs in general and in connection with ectopic
ureters and 2. its relevance as a cause of deficient ejaculate quality and
subfertility or infertility.