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Background & Objective: Labor pain is one of the most severe pains that mothers experience. Intense pain leads to stress and has unfavorable effects on the mother and fetus. This research was done to determine the effect of using Entonox (N2O) self administration on reducing labor pain in the active phase of labor& delivery, Mode of delivery, and newborn's Apgar score.
Methods: One hundred and twenty primiparous women in 29 Bahman Hospital in Tabriz were included it this randomly single-blind research. In the active phase of delivery, Entonox and Oxygen gases were used. The severity of the mother's pain was asked and was scored according to analogue criterion.
Results: There was a significant difference in frequency of pain intensity in two groups of Entonox and Oxygen. The Mean score of pain intensity in Entonex user, in the first & second stage of labor was 5.93% and 5.82% respectively, while for the oxygen users it was 6.99% and 6.74% which was significant. 41.7% of the mothers in the Entonox group had a severe pain and 11.7% had a very severe pain, whereas in the Oxygen group 58.3% of the mothers had a severe pain and 25% of them had very severe pain (p< 0.001). Meanwhile we found no significant difference between modes of delivery progress of labor and newborn's Apgar
score.
Conclusion: According to research results, Entonox reduces the intensity of labor pain more than oxygen and is effective during the first and second phase of delivery.

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  Background & objective: Different studies have been emphasized the effects of maternal position on labor and delivery these effects isn’t less important than medical and midwifery factors. This study is a quasi- experimental. This study wants to the effects of Maternal elective position during active phase on the process and outcome of Labor and delivery in primigravida women.

  Methods: The of the study were 150 women 75 women in case group (women in the elective Position) and 75 women in whom allowed to cuoie their labor control group in . All women were between 18-30 years, term pregnancy (hist and second s ??), interval of poin in second sreye of labor, the first and minu as scores, mother’s sansfa??? Of delivery experwones, onest of breasr feedy have recorded.

  Results: The results of the study showed that the elective and freedom of position significantly reduced length of active phase (p=0/002), need for oxytocin augumentation (p=0/0058), pain intensity (p=0/026), ceasarean section (p=0/0393) and increased APGAR score in the first minute (p<0/01), early onset of breast feeding (p=0/0015) and Mothers’ satisfaction of delivery experience (p=0/0001). Duration of second stage and fifth minute Apgar were not different in two groups.

Conclusions: This study showed that the Maternal elective position has positive e of resuly of deliveris and the first minuts Apgar score during active phase is good for deliveries and health