Further, the present study’s result revealed that, mothers in the study group had shorter second stage
duration than mothers in the control group. We can explain this result as, mothers in the study group may
experience sense of control that is effective in labor progression. Increasing endorphin and oxytocin may lead to
appropriate uterine contractions and shorter second stage duration. This result goes on the same line with
Behmanesh, etal. (2008) who reported that, heat can improve the local blood circulation and therefore increase
the number, duration, and intensity of uterine muscle contractions. On the other hand, this result goes on the
opposite line with the result of Ganji, etal. (2013) who demonstrated significant differences in duration of the
first and the third stages of labor as they were shorter in the heat and cold group.