1. Taavoni S, Charkamyani F, Nazem Ekbatani N, Haghani H. Co-effect of pelvic special moves by birth ball and consumption of honey syrup on the severity of labor pain in nulliparous women. Complementary Med J. 2018;7(4):2052–62.
2. dargahi r, ghazi a, hashemi Pazikoueii f, amani f. A comparative study about the efficacy of Entonox gas analegesia alone and in combination with dexamethasone in painless labor. Anesthesiol Pain. 2018;8(4):61–71.
3. Storksen HT, Eberhard-Gran M, Garthus-Niegel S, Eskild A. Fear of childbirth; the relation to anxiety and depression. Acta Obstet Gynecol Scand. 2012;91(2):237–42.
4. Sosan H, Mahrokh D, Mahin K, Mortaza G. Comparison of labor pain and factors affecting the pain perception among Primiparous and multiparous women referring to Women's private and state hospitals in Tabriz in 2010. Med J Tabriz Univ Med Sci Health Serv. 2012;34(3):117.
5. Heidaryfard S, Amir Ali Akbari S, Mojab F, Shakeri N. Effect of Matricaria Camomilla aroma on severity of first stage labor pain. J Clin Nurs Midwifery. 2015;4(3):23–31.