Currently there are contradictory findings about the effects on the newborn of different stimuli that have been applied in prenatal stimulation programs, there is no system for evaluating their performance in the short medium and long term let duly systematized.The aim of this study was to compare the effects of 3 different auditory stimulation programs on the memory newborn hearing and consequently their findings to standardize and systematize a system for evaluating the effectiveness of the best set of auditory stimuli, avoiding inappropriate practices.For this pilot study , 45 patients were divided into 3 groups: 15 pregnant women with gestational age from 16 weeks (Group 1), 15 pregnant women from 29 weeks (2nd group) 15 immediate postpartum (Group 3).The 45 patients were healthy in clinical and laboratory criteria and had an education level at least 5 of high school.The first group,...