Sereshti,M , , Asefi,F , , Shabanian,M , and Banaeian,S . "Comparing the Effects of Massage and Intra Intramuscular Pethidine on Pain Relief in the Stages of Labor and the Length of Labor", The Iranian Journal of Obstetrics, Gynecology and Infertility, 16, 80, 2013, 6-16. doi: 10.22038/ijogi.2013.2213