3Barden TP, Peter JB, Merkatz IR. Ritodrlne hydrochloride : a betamimet ic agent for use in preterm labor. I Pharmacology, clinical history, administration, side effects, and safety. Obstet Gynecol, 1980,56 : 1.
4Yajun Y, Nakayama T. Effectiveness and safety of ritodrine hydrochloride for the treatment of preterm labour : a systematic review. Pharmacoepidemiol Drug Saf,2006,15:813.
4Sajaniemi N, Makela J, Salokorpi T, et al. Cognitive performance and attachment patterns at four years of age in extremely low birth weight infants after early intervention. Eur Child Adolesc Psychia- try,2001,10(2) :122-129.
6Pandey Kiran, Bhagoliwal Ajay,Gupta Neena, et al. Predictive value of various risk factors for preterm labor. J Obstet Gynecol India, 2010,60 : 141-145.
7Loftin RW, Habli M, Snyder CC, et al. Late preferm birth. Rev Obstet Gyneco1,2010,3 : 10-19.
