Changes in accessory sex glands of stallions after sexual preparation and ejaculation.

The research paper investigated the size changes in the accessory sex glands of stallions before sexual preparation, after sexual preparation, and after ejaculation. Through ultrasonographic images, the study found that the size of most glands significantly increased after sexual preparation and decreased after ejaculation.

Research Methodology

• The researchers conducted ultrasonographic imaging on the accessory sex glands of eight stallions.
• These images were recorded at three specific points: immediately before sexual preparation, straight after sexual preparation, and directly following ejaculation.
• Subsequently, the relative size changes of the accessory sex glands were compared and analyzed.

Findings

• The study found out that the length and width of bulbourethral glands significantly increased after sexual preparation and significantly decreased after ejaculation.
• Notably, the increase in bulbourethral gland volume following sexual preparation correlated significantly with the number of false mounts attempted by stallions during sexual preparation.
• The prostate gland lobular and isthmic thickness also demonstrated this trend of increasing significantly after sexual preparation and decreasing significantly after ejaculation.
• Interestingly, the diameter of the pelvic portion of the urethra did not show any significant changes at either stage.
• Similarly, the diameter of the ampulla wall did not exhibit any significant changes after sexual preparation or ejaculation.
• Yet the total and lumenal diameter of the ampullae and vesicular glands increased significantly after sexual preparation and decreased significantly after ejaculation.
• It was noteworthy that the reduction in the lumenal area of the ampullae following ejaculation was found to have no correlation with the concentration of spermatozoa or total spermatozoa per ejaculate.

Implications of the Study

• This research provides vital insights into the physiological changes in the accessory sex glands of stallions related to sexual behavior and ejaculation.
• The findings might be of use in understanding the reproductive processes in stallions, potentially leading to better reproductive management practices.