Two-thirds of U.S. women at risk for unintended pregnancy use contraception consistently and correctly throughout the course of any given year; these women account for only 5% of all unintended pregnancies. In contrast, the 19% of women at risk who use contraception inconsistently or incorrectly account for 43% of all unintended pregnancies. The 16% of women at risk who do not practice contraception at all for a month or more during the year account for 52% of all unintended pregnancies.