Abstract
Unilateral castration of Large White X Landrace boars at monthly intervals up to 5 months of age, with the remaining testis being removed 2 months later, resulted in compensatory hypertrophy of the testis which decreased with age. In pigs 3 and 4 months old there was significant hypertrophy of the testis but at 5 and 7 months of age testicular weight of the hemicastrates did not differ significantly from control values. The increase in the testicular weight of unilaterally castrated pigs was correlated with an increase in the number of Sertoli and germ cells at 3 months of age and germ cells at 4 months of age occupying the seminiferous epithelium. This was correlated with increased total seminiferous tubule length and larger cross-sectional area of the tubule. Sertoli cell occupancy did not differ significantly between unilaterally castrated and intact boars.
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