The pill in figures and facts.

PIP: A review of the use of oral contraceptives from 1956-1966 is presented for the U.S. and several European and Latin American countries. In 1969 an estimated 9,600,000 to 10,700,000 women in the world were pill users. Estimates for the number in 1985 vary from 20,000,000 to 40,000,000. However estimates are difficult because of the improvements in fertility control that are likely to occur in the future.^ieng