Uterine contraction pain is a common problem after abortion. Optimal analgesic for such suffering is still needed to be guaranteed. Flurbiprofen Axetil is a target-distributable non-steroidal anti-inflammatory drug (NSAID) functioning via block the synthesis of prostaglandin E (PGE). The investigators hypothesized that Flurbiprofen Axetil could suppress the uterine contraction pain after abortion effectively.