<unk>  may be either congenital or acquired. Because the hypothalamic pituitary gonadal axis is intact, serum hormone levels are normal.
Ejaculatory duct obstruction
Ureteropelvic junction obstruction
Urethral caruncle
Penile agenesis
Congenital Absence of the Vas Deferens
Epididymal head cyst
Dilated rete testis
Testicular microlithiasis