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Theriogenology. 1983 Jul;20(1):121-31. doi: 10.1016/0093-691x(83)90031-6.

The effects of stanozolol and boldenone undecylenate on scrotal width, testis weight, and sperm production in pony stallions.

Theriogenology

T L Blanchard, R G Elmore, R S Youngquist, W E Loch, D K Hardin, C J Bierschwal, V K Ganjam, J M Balke, M R Ellersieck, L J Dawson, W S Miner

Affiliations

  1. Department of Veterinary Medicine and Surgery, University of Missouri-Columbia, Columbia, MO 65211 USA.

PMID: 16725839 DOI: 10.1016/0093-691x(83)90031-6

Abstract

Fifty mature pony stallions were randomly assigned to one of five treatment groups: Group 1- controls (no treatment), Group 2 - 0.55 mg/kg stanozolol weekly for 13 treatments, Group 3 - 1.1 mg/kg stanozolol every 3 weeks for 5 treatments, Group 4 - 1.1 mg/kg boldenone undecylenate every 3 weeks for 5 treatments, and Group 5 - 0.55 mg/kg boldenone undecylenate weekly for 13 treatments. Scrotal widths (SW), combined testis weights (CTW), and daily sperm productions (DSP) were not different between Groups 1 and 2. Ponies in Group 5 had smaller SW (P<0.01), smaller CTW and decreased DSP compared to controls (P < 0.05). Although SW for ponies in Groups 3 and 4 were less than for controls (P < 0.01), CTW and DSP were not different. The only treatment regime that did not alter SW, CTW, and DSP was Group 2 (0.55 mg/kg stanozolol weekly for 13 treatments).

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