Objective:The goal of our study was to evaluate the safety of water birth through analyzing the labor,
the laceration of birth canal, the complications of postpartum, the drugs of easing pain and the outcomes of neonate. Methods: 1227 women having water birth were studied during March 1st 2003 to June 30th 2007, 1227 woman who had a normal vaginal delivery as the control group. We compared the labor, the laceration of birth canal, the complications of parturition and postpartum,the drugs of easing pain and the outcomes of neonate in two groups. Results: There was no significantly statistic difference in first and second stage of labor, incidence of umbilical cord breakage, puerperal morbidity, postpartum hemorrhage, perineum/vaginal haematoma, postpartum urinary retention, and neonatal distress between two groups( P>0.05). No episiotomy in waterbirth group( P<0.01). The rate of drugs to ease pain after entering the bath and postpartum in water birth group was lower than that of control group( P < 0.01). Conclusions: Water birth can ease pain of labor, lessen the trauma of birth canal and do no harm to maternal and neonatal outcome.