Demographic trends of tubal sterilization in the United States 1970-75.

An estimated 2,300,000 women in the United States underwent tubal sterilizations in 1970-1975. During this period the rate of tubal sterilizations per 1,000 women 15-44 years of age rose from 4.7 to 11.7. We studied the influence on sterilization trends of four demographic variables: age, region of residence, race, and marital status. Women 25-34 years of age were twice as likely to be sterilized as older or younger women. Rates were about 40 per cent lower in the West than in the rest of the country. In 1970 rates for non-white women were double those for Whites. Rates for Whites rose faster than those for non-Whites, however, and by 1975 the rates were similar for the 2 races. Non-Whites still tended to be sterilized about one year younger than Whites, and marked regional differences existed in the race-specific rate trends. Rates rose more sharply for previously married women than for currently married women; by 1975 rates for these two groups were similar. Never married women had rates about 1/7 of those of currently married and previously married women. Among the never married, tubal sterilization rates for non-Whites were nine times higher than those for Whites.