Abstract
The change in carnitine content in seminal plasma after reversible injection occlusion of was deferens (RIOVD) was observed. RIOVD is a safe, effective and simple method of male fertility control. Carnitine was determined by microenzymatic method. The incidence of sperm disappearance increased with the duration of RIOVD and reached 90% at the end of 12 months after operation. Before RIOVD, the mean value of carnitine in seminal plasma was 336.9±78.1 nmol/ml (X±SD, n = 58); after RIOVD, the mean value of seminal plasma carnitine was 112.7±50.7 nmol/ml (n = 172) in the group with sperm disappearance, and 172.5±71.7 nmol/ml (n = 51) in the group without sperm disappearance. There was a significant difference in carnitine content between pre-operation and postoperation (p<0.01). After RIOVD, the carnitine concentration in seminal plasma of the group with sperm disappearance was lower than that of the group without sperm disappearance (p<0.01). The results suggest that carnitine content in seminal plasma following RIOVD may be a reference index for judging the success or failure of the operation.
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