This figure is generally accepted as being accurate, and the figure most doctors will quote when asked for a reliability figure.
Although most vasectomy failures occurred relatively early , 2 pregnancies occurred more than a year after the vasectomy.
In the absence of paternity testing, it is not certain that pregnancies that occur to women whose husbands undergo vasectomy are associated with vasectomy failure.
Vasectomy failure occurs in 1-3% of cases when fulguration and surgical clips used to occlude vas deferens.
Although considered of secondary importance, good surgical technique subjectively measured by the minimal amount of accessory tissue attached to the excised vasa was also considered to aid in reducing the number of vasectomy failures. If it is assumed that the 1 excluded woman with a reported pregnancy indeed had a true failure and that it occurred at 6 months , then the cumulative probability of failure per 1,000 procedures would be 12 at 1 year after vasectomy and 11 at years 2, 3, and Among the 540 women at risk for pregnancy, the cumulative probability of failure per 1,000 procedures was 4 at 1 year after vasectomy and 13 at years 2, 3, and
Cases in which the estimated date of conception is after the date of vasectomy are considered true failures.
Contraceptive failure rates are the ones usually quoted - and what we are mostly interested in!
A successful vasectomy is extremely unlikely to cause a pregnancy, especially after repeated semen analyses confirming the absence of sperm before and after the supposed pregnancy.
Because failure of vasectomy may result in pregnancy, it is of utmost importance to follow closely instruction for determining sterility.
“Couples who are considering vasectomy should understand that it may take a long time to become effective and failures do occur,” says Dr.
Standard vasectomy procedures that fail usually show persistent motile or non-motile sperm in the ejaculate.
Oftentimes, at the time of vasectomy reversal, we don’t see any ligature remaining at the vasectomy site.
Tubal ligation is ten times more likely to result in an unplanned pregnancy than vasectomy.
Any man not having been cleared after the end of the study period is classed as an “Early failure”.
To calculate the cumulative probability of failure, the woman who reported a pregnancy at 1 year was not included because no information was available regarding her pregnancy.
Detailed methods of the CREST study have been reported elsewhere, 4 including the details of the vasectomy comparison cohort.
OBJECTIVE: To describe the pregnancy rates among women whose husbands underwent vasectomy.
The 3 women with preexisting pregnancies at the time of vasectomy were not included.
Jamieson DJ, Kaufman SC, Costello C, Hillis SD, Marchbanks PA, Peterson HB.
Six of the pregnancies that occurred within three months were presumably due to unprotected intercourse during the waiting period, as no sperm were found in our study.
Vasectomy is a commonly used, highly effective method for the control of fertility in the human male.
The standard incision method has been in use for many years, and the “no-scalpel vasectomy” was introduced by S.Q.
NSV is preferred over the conventional vasectomy as it has several advantages.
The success rate with the use of fascial interposition was significantly higher at 22 weeks after vasectomy than ligation and excision alone .
Regardless of the method, all patients need to be counseled about possible failure and the potential for re-canalization and pregnancy.
Sperm granuloma is found in up to 60% of vasectomized men at vasectomy reversal.
In a traditional vasectomy, the surgeon makes one or two incisions to gain access to the vas deferens; in the no-scalpel method, a small puncture in size is all that required.
Overall percentage of complications after NSV 4% versus 1% for conventional vasectomy.
The likelihood of recanalization increases when sperm granuloma is present at the vasectomy site.
Current studies did not confirm vasectomy to be associated with the increased risk of the development of atherosclerosis-related diseases, prostate or testicular cancer.
Reappearance of nonmotile sperm after azoospermia is rare and was found in 6-8% of patients after vasectomy.






















