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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