The potential impact of improvements in contraception on fertility and abortion in western countries

Survey information on fertility intentions, patterns of contraceptive use, contraceptive failures and abortions is used to develop estimates of unwanted births and of unplanned pregnancies for seven countries, by method of contraception. Potential improvements in contraception, leading to more use of highly efficient methods are considered, and several scenarios for improved contraceptive use are presented. The impact each would have on fertility levels and on abortion rates is estimated. Although improvements in contraception will have only a limited impact on fertility — which is already very low — their impact on abortion could be considerable