Methods: A randomized, double-blind, placebo-controlled clinical trial was conducted on 108 women with the request of pregnancy termination.The subjects were randomly assigned into four groups: PCB (n=27), lidocaine spray (n=27), PCB plus lidocaine spray (n=27) and placebo(n=27).Intraoperative and postoperative pain scores were measured with a standard Visual Analog Scale (VAS).