Approximately 7% of men having had vasectomy will attempt to have a reversal.  However, attempts to reverse traditional vasectomies can be thwarted by insufficient vas length due to extensive excision or significant vas damage due to use of electrocautery.  Even when a successful reanastomosis is achieved, sometimes fertility is impaired by the presence of sperm antibodies resulting from sperm leakage from the cut ducts. 

In any case, vasovasostomy generally needs to be done under general anesthesia in the operating room since extensive incision of the scrotum is often necessary to locate the retracted loose ends of the severed vasa deferentia.

Pro-Vas eliminates the potential problems that can make reversal difficult or even impossible.  Since the Pro-Vas clips can be palpated through the scrotum, in most cases, it should be possible to perform the vasovasostomy through a small incision under local anesthesia in an outpatient setting. tThis fact alone provides significant cost savings for the patient and shortens the procedure time significantly.

Cuts are made on each side of the Pro-Vas clip and the two ends are rejoined.  No time is spent searching for lost ends.  Sufficient tissue remains available to perform the reanastomosis without raising the testicle.  Since the vas was never transected, there is a significantly reduced chance of sperm antibody formation so that the likelihood for achieving fertility is much higher.