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Ventral penile deviation occurs much less commonly than spiral deviation and the etiology is uncertain. Ventral deviations may occur as a result of altered blood flow through the ventral portion of the CCP or due to stretching or injury of the apical ligament, both of which probably result from chronic traumatic injury [1, 17, 18].

Ventral penis deviation is obvious as long gradual curvatures of the erect penis (Figure 19.58). The curvature frequently originates proximal to the junction of the sheath and prepuce [17, 18]. These conditions become more apparent as erection pressure increases. Because ventral penile deviation can be induced during electroejaculation, observation during natural breeding is recommended, especially for less obvious cases. These conditions are only considered to be pathologic when they consistently prevent intromission.

Figure 19.58 Ventral deviation.