It is likely that you will be able to father a child. However there are two ways to approach this issue. Traditionally, you would go through a vasectomy reversal procedure. The success is not related to how long ago you had the vasectomy, but what is found at the time of the attempted reversal. Assuming that to be the case, the fluid obtained from the vas is predictive of potential success.
Vasectomy reversal is done in an operating room under general anesthesia.
The actual success or failure may not be known for several months. Under the best circumstances a pregnancy may be achieved with regular intercourse. In vitro fertilization or IVF may be used for sperm counts or motility that are too low for success with artificial insemination. The sperm must be capable of fertilizing an egg. Basically sperm and egg are mixed in a glass dish allowing fertilization to occur normally.