Relationships Among Age, Body Weight, Scrotal Circumference, Semen Quality and Peripheral Testosterone and Estradiol Concentrations in Pubertal and Postpubertal Holstein Bulls
Year: 2008
Type: article
Abstract: In the present study, the correlations among age, body weight, scrotal circumference (SC), semen quality and peripheral testosterone and estradiol-17beta (E(2)) concentrations were investigated in pubertal (n=5) and postpubertal (n=7) groups of Holstein bulls over a 6 week period. There were significant positive correlations (P<0.01) among age, body weight and SC in both groups, and similar significant correlations between sperm motility and SC in pubertal bulls (P<0.01) and between sperm concentration and SC in postpubertal bulls (P<0.05). The sperm motility after collection (P<0.05) and after freezing and thawing (P<0.01) of the postpubertal bulls correlated positively with the E(2) concentration. Estrogen may be important for the function of postpubertal bull testes, in which it may regulate spermatozoa motility in vivo.
DOI: 10.1292/jvms.70.119
Language: English
Subfield: Reproductive Medicine
Field: Medicine
Domain: Health Sciences
SDG: Zero hunger
Open Access status: hybrid
OpenAlex ID: W2085779170