A vasectomy (vah-SEK-tuh-mee) is a sterilization procedure that
severs the vas deferens (vahs DEF-er-enz), which is the tube
that transports sperm from the testicles. In most cases, it's
possible to reverse this operation, and reconnect a path through
which sperm can travel. Microsurgical techniques have greatly
improved the success rate of reversals. When a vasectomy is
reversed within the first two years or so, about 75 percent of
couples are able to conceive. However, this percentage drops off
rapidly, the longer you wait between the operations. There are
two major types of vasectomy reversal. The most common involves
re-joining the ends of the vas deferens. Another method is to
attach the vas deferens directly to the epididymis, the
structure in the testicles which acts as a sperm reservoir. This
procedure is more complex, and associated with lower rates of
pregnancy. It's performed only when inflammation or scarring has
blocked the epididymis, preventing sperm from leaving. Another
factor that may influe