This study will develop and field test a maintenance of smoking abstinence program to be designed for a predominately low-income, high-risk population of women from a wide variety of ethnic and racial backgrounds who have quit smoking because of (or during) their pregnancy. The study will compare biologically confirmed postpartum smoking relapse rates of women who receive an educational intervention during pregnancy combined with sustained telephone counseling after that intervention, with women who receive only an educational intervention. Participants will begin at 28 weeks prenatal and will be followed through 1, 3, 6, and 12 months postpartum.