The total fertility rate in Quebec, which has remained high throughout the 1940s and 1950s declined rapidly between 1960 and 1975 (from 3.8 children/woman to 1.8). Although data on contraceptive practice in Quebec is fragmentary, data from a number of sample surveys indicate a quiet revolution in reproductive behavior during the 1960s--part of a profound change in values and behavior that characterized the period. Using service statistics from the Regee de l'Assurance-Maladie du Quebec, the authors examine a further dramatic shift in contraceptive practice during the 1970s. While in 1971 only 2.5% of women surveyed said they or their husbands had been surgically sterilized, a follow-up survey in 1976 found that almost 1 in 3 women under age 40 who had been married at least 5 years was in a marriage where 1 partner was sterilized. By 1979 1/2 of Quebec women reaching age 40 had become surgically sterile (33% as a result of contraceptive sterilization and 17% as the result of hysterectomy), levels which will probably be surpassed by future generations. Findings are compared to the situation in other Canadian provinces and in the US.