The vas deferens is the tube (duct) that carries sperm from the testicles to the urethra (tube in the penis). Vasectomy is the leading cause of infertility due to obstruction in the male reproductive ducts, but men may be born with or acquire obstruction later in life.
The ultimate success of a reconstructive procedure achieving a pregnancy, is dependent on several factors: the age and fertility of the female partner, the age and previous fertility history of the male, the method of vasectomy (location and length of the segment removed), the surgeon's experience, the technique of reversal (including the use of optical magnification), the quality of the fluid seen coming from the vas deferens at the time of the operation, and length of time since the vasectomy was performed.
