Zhao S C, Zhang S P, Yu R C
Shanxi Provincial People's Hospital, Shanxi Provincial Fertility Regulation Centre, Taiyuan, People's Republic of China.
Int J Androl. 1992 Dec;15(6):460-4. doi: 10.1111/j.1365-2605.1992.tb01138.x.
This report describes the procedure for percutaneous injection of silicone to form plugs in the vas deferens. The injection of 0.1-0.16 ml Chinese-made silicone into 14 men achieved occlusion of a 1-cm length of the vas. Sperm concentrations declined within 1 month of the operation and azoospermia was achieved in all men by 9 months.
