Project CHOICES developed an integrated behavioral intervention for prevention of prenatal alcohol exposure in women at high risk for alcohol-exposed pregnancies. Settings included primary care, university-hospital based obstetrical/gynecology practices, an urban jail, substance abuse treatment settings, and a media-recruited sample in three large cities. The intervention was based on motivational interviewing and targeted both adoption of effective contraception and reduction of alcohol use. Treatment included 4 manual-guided sessions delivered by mental health clinicians and 1 contraceptive counseling session delivered by a family planning clinician. This paper describes the rationale for treatment; the use of motivational interviewing and the transtheoretical model for a dual-focused approach to behavior change; the development of the Project CHOICES intervention; development of the study protocol and treatment manual; and selection, training, supervision, and monitoring of study counselors. Implications for future applications of the intervention are discussed. (Contains 3 tables.)