June 2007

Document Type


Degree Name



Dept. of Public Health and Preventive Medicine


Oregon Health & Science University


Objective It is estimated that 54.9 % of all Americans are overweight (BMI = 25-30 m/kg2) or obese (BMI > 30 /kg2) [1]. Because obesity is an independent risk factor for a number of medical problems [1], this has resulted in serious health consequences for many individuals and for the health care system as a whole. While rates of abortion in the United States appear to be declining [2], unintended pregnancy continues to be a major problem. Numerous factors contribute to a woman’s risk of unintended pregnancy including socioeconomic and demographic variables as well as fertility contraception use, and sexual behavior. Recent studies suggest that BMI may also play a role in the risk of unintended pregnancy [3]. The primary objective of this study was to characterize the relationship between BMI and unintended pregnancy. We also explored the effect of BMI on sexual behavior, fertility and perceived fertility and contraceptive use. Methods This study employed the National Survey of Family




School of Medicine



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