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Provided a patient is adequately warned about the risk of failure of the vasectomy at any time during his life, a single semen analysis after 3 months is sufficient grounds for discontinuing other contraceptive precautions.
However, transitory reappearance of sperm 12 months following successful vasectomy occurs in about 0.6% of men.
This incidence is 18 times greater than the reported pregnancy rate following successful vasectomy.
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