Abstract: Objective To discuss application and effects of technique of unprotected perineum delivery in pregnant women. Methods 360 primiparas expecting to have vaginal delivery from January to September 2013 in Tangxian People’s Hospital were selected by convenient sampling and randomly and equally divided into the observation group and the control group. In observation group, midwife would direct the pregnant women to hold her breath and breathe when uterine neck whole opened and fetal head crowned and helped them give birth to a baby under state of unprotected perineum. In the control group, traditional delivery method was chosen. Comparison of soft birth canal laceration, postpartum hemorrhage, duration of delivery, neonatal asphyxia and so on between the two groups was made. Results Rate of lateral episiotomy and of postpartum hemorrhage in the observation group were demonstrated 22.2%and 2.2%, which were obviously lower than that of 75.0%and 13.9%in the control group. The difference had statistical signiifcance (P<0.001). Both groups had no III laceration. However, occurrence rate of I laceration observed was higher in the observation group than that in the control group, on the contrary, rate of II laceration was lower (P=0.001). Duration of 3 birth processes or the whole delivery in the observation group were shorter, and difference between the two groups had statistical significance (P<0.001). There was no statistical significance in the difference of neonatal asphyxia between the two groups (P>0.05). Conclusion Unprotected perineum delivery could reduce occurrence rate of lateral episiotomy and infection of perineum incision, improve comfort of delivery and occurrence rate of natural delivery, and meanwhile decrease occurrence rate of postpartum hemorrhage. Therefore, the unprotected perineum delivery was feasible in clinical practices.

Key words: unprotected perineum, primipara, normal delivery