The Visual Guide to
Equine Reproduction
Male Reproductive System: Penis

Washing the Penis.
The penis is washed with plain water prior to the collection of semen with the artificial vagina. Soap and disinfectants are avoided because of their deleterious effect on semen quality. This is also a good time to examine the penis for lesions and other abnormalities.
Asbury AC (1988)

Urethral Process.
Adjacent to the urethral process is the suburethral diverticulum. This pocket frequently accumulates smegma which is then referred to as "the bean".
Asbury AC (1988)

Swabbing the Urethral Diverticulum.
Swabbing of the urethral orifice is a standard practice during breeding soundness examination of the stallion, for evaluation of the possibility that the urethra and tract have been colonized with bacteria that cause metritis in the mare. The urethra is swabbed before and after semen collection, and the semen is also cultured. The purpose of the swab is to identify stallions with penile skin flora made up of a monoculture of Pseudomomas or Klebsiella, or other putative metritis pathogens.
Asbury AC (1988)

Keratinization of the Penis.
Keratinization of the mucous membranes of the penis of a stallion.
Roberts SJ (1973)

Prolapse and Edema of the Penis.
Prolapse and edema of the penis. This stallion recovered with palliative treatment, and protection against further irritation. Paraphimosis.
Roberts SJ (1973)

Erythema of the Penis.
Balanoposthitis is not a primary condition in a stallion, except as a sequel to overuse and friction. Usually, there would be a causative lesion like trauma, habronemiasis, paralysis, etc.
Larsen RE (1995)

Paraphimosis.
Painful constriction of the preputial opening that does not allow the penis to be retracted. The exposed penis has been wrapped in a protective bandage.
Shipley C (2006)

Paraphimosis - Close Up.
Painful constriction of the preputial opening that does not allow the swollen penis to be retracted.
Shipley C (2006)