Effects of Stilbestrol and Testosterone Pellets Implanted into Growing-Fattening Pigs

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Abstract
The effects of implanting pellets of stilbestrol and testosterone subcut. were studied with 42 growing-fattening pigs. Two lots of 7 pigs each were assigned to each exptl. group[long dash]control. testosterone-implanted, and stilbestrol-implanted. The implantations were made at the beginning of the expt. and 12 weeks later. The pigs averaged 43 lbs. at the start of the expt. and were slaughtered as they reached 210 lbs. The following characteristics were studied; avg. daily gain, feed per 100 lbs. gain, daily feed consumption, dressing percentage, length of carcass, wt. of regular ham, % of external fat in the regular ham, eye-muscle measurement, fat back thickness, length of femur, sp. gr. of the femur, wt. of leaf fat, and seediness of the fresh belly. Of these characteristics, seediness of the belly in the stilbestrol group is the only one that showed a significant deviation from the control. The reproductive organs of the treated pigs showed definite evidence of hormonal stimulation.

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