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Vasectomy failure
Statistics reveal that 0.5 percent to 1 percent of all vasectomies fail.
This variation in vasectomy failure is due mainly to how the procedure is performed and
whether or not the patient returns to perform the follow-up semen testing.
The main reason for vasecomy failure is people do not usually allow the time for the sperm
to be expelled totally from the reproductive ducts. Sperm can remain active for almost eight weeks.
During this time unprotected sex may result in pregnancy.
As a generally procedure, doctors take a semen sample 6 to 8 weeks following a vasectomy
for a close monotoring of patients fertility.
Those men thinking that they are safe from day one after the vasectomy and
forget to perform regular checking or ignore contraception precautions
are the most likely to experience vasectomy failure.
Only when semen tests confirm the male sterilization, couples can consider vasectomy verified as safe.
In very rare cases, vasectomy fails due of the spontaneous reconnection (known as recanalization)
of the severed ends of the vasa deferentia. Recanalization is considered as a surgery/technical error.
To reduce the chances of recanalization, it is in doctor's usual to leave a gap between the two cut
ends of the vasa deferentia.
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