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

This study investigated the effects of two steroids, stanozolol and boldenone undecylenate, on the reproductive aspects of pony stallions, such as scrotal width, testis weight, and sperm production. The results showed varied effects, the most pronounced being the decrease in these aspects in ponies injected frequently with boldenone undecylenate.

Study Overview

• The research was designed to assess the impact of stanozolol and boldenone undecylenate on the reproductive capacity of pony stallions.
• 50 mature stallions were divided into five groups, with each group receiving a different treatment regime. The stallions in Group 1 received no treatment, serving as the control group.

Controls and Test Groups

• Group 1 (Control) – The ponies received no treatment.
• Group 2 – Ponies received 0.55 mg/kg stanozolol once a week for 13 weeks.
• Group 3 – Ponies received 1.1 mg/kg stanozolol every 3 weeks for 5 treatments.
• Group 4 – Ponies received 1.1 mg/kg boldenone undecylenate every 3 weeks for 5 treatments.
• Group 5 – Ponies received 0.55 mg/kg boldenone undecylenate once a week for 13 weeks.

Test Parameters

• Scrotal width, testis weight, and daily sperm production were the principal parameters recorded. These are crucial indicators of reproductive health and fertility in male ponies.

Findings

• There were no significant differences in scrotal width, testis weight, or sperm production between the control group and Group 2, which were administered low weekly doses of stanozolol.
• Group 5, who received frequent injections of boldenone undecylenate, exhibited a decrease in scrotal width, testis weight, and sperm production.
• The Group 3 and 4 stallions, who received less frequent doses of either stanozolol or boldenone undecylenate, respectively, had a smaller scrotal width than the controls, but their testis weight and sperm production remained the same.

Conclusion

• The only treatment that did not cause changes to the stallions’ scrotal width, testis weight, and daily sperm production was the 0.55 mg/kg stanozolol administered weekly for 13 treatments (Group 2). This could suggest that low, frequent doses of stanozolol might have the least impact on these key reproductive parameters in pony stallions.