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Background & Aims: One of the important tasks in managing labor is improving delivery outcome. Maternal pushing during the second stage of labor is an important variable to affect this. This study is done to investigate the effect of breathing technique of blowing on delivery outcome. Materials & Methods: This study was a clinical trial which involved 166 nulliparous pregnant women performed at Kamali Hospital in IRAN. Subjects were randomly assigned to two groups using breathing techniques (case group) and valsalva maneuver (control group). In the control group, pushing was done with holding the breath. In the breathing techniques group, the women were asked to take 2 deep abdominal breaths at the onset of pain, then take another deep breath, and push 4-5 seconds with the open mouth while controlling the exhalation. And from the crowning stage onward, the women were directed to control their pushing, and do the blowing technique. Results: The results showed that concerning the length of second stage of labor, there was no significant difference between the two groups (P=0.619). In breathing techniques group, the first and fifth minute Apgar was higher (P = 0.044), while the frequency of abnormal fetal heart rate was higher in control group (P = 0.002). Conclusion: The results showed that the use of breathing techniques in second stage of labor, likely improve neonatal outcome while it does not affect on the length of second stage of labor.

Keywords: breathing technique, delivery, pushing, second stage

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