Nearly half of all pregnancies in the United States are unintended. In 2002, the direct medical costs of unintended pregnancies were estimated to be almost five billion dollars. Moreover, women with unintended pregnancies tend to delay seeking prenatal care and making the necessary life style changes for the fetus. Subsequently, unintended pregnancies have the potential to lead to low birth weight infants and potentially poorer long-term child development. Although there are negative consequences with unintended pregnancies, repeat unintended pregnancies impose even greater health risks for both mothers and infants. To prevent unintended and repeat unintended pregnancies, family planning methods must be utilized effectively. Despite the potential risk associated with negative health outcomes of mothers and infants, repeated unintended pregnancies have not been studied extensively. Therefore, the purpose of this study was to examine the relationship between the number of unintended pregnancies and effective use of family planning methods. A secondary analysis of The National Statistics of Family Growth, cycle 6 (2002) was done. The study showed a statistically significant relationship association between the number of unintended pregnancies and effective contraceptive use after adjusting for confounders which include age, race, annual household income, marital status and types of insurance. The recommendation of this study include creating better strategies for family planning practices and the need to improving contraceptive education and service delivery for those with higher risk.