[Dynamic changes of the epididymal size after vasectomy: An ultrasonographic observation].

Objective: To investigate the dynamic changes of the epididymal size 1 year after vasectomy.

Methods: Fifty male volunteers received vasoligation. Before and at 1, 2, 3, 6, and 12 months after operation, we measured the size and detected the internal echoes of the epididymis using color Doppler ultrasonography.