Once they are certain that they do not want to have children, many people start looking for effective, long term birth control solutions. Male sterilization, called vasectomy, is a permanent form of birth control. During a vasectomy, a man's vas deferens is cut, tied, cauterized, or blocked off to prevent sperm from replica uggs wholesale entering his ejaculate during sex. The vasectomy procedure is quick and ugg outlet recovery is also swift, with most men returning to their normal routines within a week. However, vasectomy is not always perfect, and sometimes men are still able to impregnate their partners after the procedure.
Within about three months after the vasectomy, men uggs sale must return to their doctors to have their sperm count checked, and to verify that their ejaculate is free of sperm. At this office visit, some men may still have sperm in their ejaculates. Sperm are able to live in the tiny tubes of a man's reproductive system for several months after vasectomy. Doctors recommend that couples avoid unprotected sex during this time, or pregnancy may result.
After the first few months, a primary reason for vasectomy failure is when sperm leak out of the cut end of the vas deferens, create a new channel, and enter a man's reproductive system and ejaculate. This is very rare, but it can lead to pregnancy. A study published in 2004 in the journal "BioMed Central Urology" found that vasectomies using cauterization to close the vas deferens have higher rates of long term success. Cauterization uses very high temperatures to seal the ends of the vas deferens closed, which may reduce the chances of sperm leaking out of the vas.
Researchers from the CDC questioned over 500 fertile women about their experiences with pregnancy after their partner had a vasectomy. The women were contacted periodically over five years. Out of 540 women, six pregnancies occurred within five years, all between six and 72 weeks after vasectomy. Three conceptions took place within 10 weeks of the vasectomy, indicating that sperm were still viable in the man's system. The other three pregnancies occurred at 20, 66, and 72 weeks post vasectomy. The researchers concluded that the failure rate for every 1,000 vasectomies was 9.4 percent during the first year, and 11.3 percent for years two to five years.