We have carried out in the province of Soria neoplastic mortality tendency curves for tumors in the breast, uterus and ovaries, on the basis of their adjusted rates of mortality during four periods: three decades (1950-59/60-69/70-79) and one six-year period (1980-85). We have observed an increased risk of mortality due to breast tumors in women, which is statistically significant (p less than 0.01) in the global provincial figure, which has gone from an adjusted rate of 6.08 deaths per 10(5) women in 1950-59 to 14.25 in the years 1980-85. We have also detected an increased risk of ovarian tumors in the provincial total, rising from 0.48 to 2.0 deaths per 10(5) women, while those located in the uterus show a virtually stable mortality over the 36 years under study (5.89/1950-59) (5.24/1980-85) x 10(5) women. In relation to other existing figures, our rates are, in the case of breast and ovarian tumors, similar to the global Spanish figures and lower than those for Cataluña and Navarra. In the case of tumors of the uterus, the adjusted mortality rates are lower than the national average and lower than any other Spanish figures available.