Due to the demographic change that our country is living with the arrival of immigrants of differe n t nationalities, we wonder if these new users of the National System of Health present the same or different problems of health that the autochthonous population. In particular in this article we think about if the women coming from America of the South, immigrants' majority population in our area of health, they present different risk of suffering cancer of uterine cervical, and for they specify it changes in the s c reening program. Looking for information in the l i t e r a t u re has not found evidences that it is necess a ry to vary the intervals in the screening pro g r a m , in spite of the fact that differences exist in the pre v alence and in some factors of risk for this illness.