IRCT2015111725002N2 IRCT 2016-01-12 Vice Chancellor for Research ,Hormozgan University of Medical Sciences.Mother & Child Welfare resear The impact of water birth on childbirth Effect of water immersion during the first stage of labor on pain and the outcome of labor of primipara women attending to Khaleej-e- fars hospital in Bandar Abbas 2015-11-22 anticipated 200 Complete https://irct.ir/trial/20988 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Used, Assignment: Parallel, Purpose: Supportive. 2 Labor pain. Intervention 1: In the intervention group, mother in the active phase of labor will enter into the tub full of water with the appropriate temperature in order to investigate the effects of immersion in water on the duration and intensity of labor. Labor pain intensity will evaluate by using the VAS before entering the water and then every hour until exiting from water. Mother will remain in water all of the first stage of labor. The duration of first stage of labor will calculate in minutes from 4 cm cervical dilatation to fully cervical dilatation.Mother will have no restrictions on eating and drinking. Finally, the results will be compared with the control group. Intervention 2: In the control group: routine care, labor control will perform and will not use any method of pain reduction during labor. Mother will have no limitation on choice of positions during labor. Labor pain intensity will evaluate by using the VAS every hour until full dilatation of cervix. The duration of first stage of labor will calculate in minutes from 4 cm cervical dilatation to fully cervical dilatation. Mother will have no restrictions on eating and drinking. Finally, the results will be compared with the intervention group.