Assessment of development of the testes and accessory glands by ultrasonography in bull calves and associated endocrine changes
The testes, prostate and vesicular glands of 10 bull calves were examined by ultrasonography every 2 wk from 2 to 46 wk of age, at which time the scrotal circumference (SC) of all the calves had reached pubertal size (28 cms). Computer-assisted image intensity analysis (numerical pixel values) was c...
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Veröffentlicht in: | Theriogenology 1997-07, Vol.48 (1), p.119-132 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The testes, prostate and vesicular glands of 10 bull calves were examined by ultrasonography every 2 wk from 2 to 46 wk of age, at which time the scrotal circumference (SC) of all the calves had reached pubertal size (28 cms). Computer-assisted image intensity analysis (numerical pixel values) was conducted. Blood samples were collected every other week from 2 to 46 wk of age. Testicular diameter increased in a linear manner from 2 to 46 wk of age, but the diameter measured in a transverse plane (caudal) was greater between 10 and 34 wk of age than when measured in a longitudinal (lateral) plane (P |
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ISSN: | 0093-691X 1879-3231 |
DOI: | 10.1016/S0093-691X(97)00195-7 |