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more children ever.3 A study of births to ever-married women found that the proportion of births that were unplanned decreased from 38% in 1969–1973 to 32% in 1978–1982, then increased again to 35% in 1984–1988.4 Another study comparing the 1982 and 1988 NSFG survey results found that there had been no change in the unintended pregnancy rate between 1982 and 1987, but that the unintended birth rate had increased from 25 per 1,000 women aged 15–44 to 27 per 1,000, while the abortion rate fell by a similar amount.5 An earlier study based on the 1982 NSFG concluded that 46% of women aged 15–44 at the time of the survey had experienced one or more unintended pregnancies and that at 1982 rates, 46% would have at least one abortion by age 45.6 The publication of data from the 1995 NSFG7 provides information on the intendedness of births during the five years preceding the 1995 survey interviews, and can be used as the basis of an updated report on unintended pregnancy. In this article, we assess the prevalence of unintended pregnancy during this period, the Stanley K. Henshaw is deputy director of research with The Alan Guttmacher Institute, New York (AGI). The research on which this article is based was funded by the Andrew W. Mellon Foundation and The Rockefeller Foundation. The author thanks his colleagues in the research department of AGI: Haishan Fu, for calculations of contraceptive use; Suzette Audam, for programming; and Yvette Cuca, Taylor Haas and Shelby Pasarell, for research assistance. Unintended Pregnancy in the United States