Cryptorchidism is a developmental disorder in male animals characterized by the failure of one or both testes to descend into the scrotum.

Chromosomal abnormalities causing infertility in male animals refer to genetic irregularities involving the number or structure of chromosomes that disrupt normal reproductive function.

Congenital sperm cell defects in male animals are a significant cause of Impotentia generandi. These defects originate during the developmental stages of spermatogenesis, often due to inherited genetic abnormalities or chromosomal anomalies.

Testicular hypoplasia is a congenital condition in male animals where one or both testes fail to develop to normal size and function due to incomplete or defective development of germ cells.

Impotentia generandi is the inability or reduced ability to fertilize the ovum due to pathology of the testes, mesonephric ducts, or accessory sex glands.

Uncommon causes of libido loss in animals are often overlooked but can significantly affect breeding performance and fertility outcomes.

Balanoposthitis refers to the inflammation of both the glans penis (balanitis) and the prepuce (posthitis) in male animals.

The inability to withdraw the penis into the prepuce is called paraphimosis. It results in edema, swelling, and balanoposthitis.

Phimosis is the inability to protrude the penis beyond the sheath or prepuce. It may be congenital in young dogs, cats, and horses.

Tumors of the penis and prepuce in male animals are abnormal growths that can develop on the penile tissues or the preputial sheath.