Declining testicular function in the aging stallion: Management options and future therapies

Area of Science:

• Equine reproductive biology
• Andrology
• Veterinary science

Background:

• Aging stallions often experience reduced fertility due to declining testicular function.
• This age-related decline, known as testicular degeneration, leads to significant economic losses in the equine breeding industry.

Purpose of the Study:

• To describe clinical recognition of age-related testicular degeneration in stallions.
• To provide management strategies for improving reproductive outcomes in mares and stallions.
• To present the current understanding of the pathophysiology of age-related testicular decline.

Main Methods:

• Clinical observation and recognition of testicular degeneration signs.
• Review of current literature on equine reproductive physiology and pathophysiology.
• Analysis of recent studies on the underlying causes of age-related testicular dysfunction.

Main Results:

• Established clinical signs for identifying testicular degeneration in aging stallions.
• Outlined practical management strategies for enhancing fertility in equine breeding programs.
• Summarized recent research into the molecular and cellular mechanisms of testicular aging.

Conclusions:

• Early recognition and strategic management can mitigate economic losses from declining stallion fertility.
• Understanding the pathophysiology of testicular aging opens avenues for future therapeutic interventions.
• Further research into the causes of testicular degeneration may lead to treatments to delay aging effects.