Intimate partner violence (IPV) victimization during pregnancy is a major public health concern, yet little is known about how risk factors for IPV during pregnancy may depend on whether women have histories of victimization dating back to early childhood (ages 0-5 years). This study examined whether risk factors for physical IPV victimization during pregnancy (a pregnancy that was not planned and prenatal substance use) differed for women with versus without early childhood victimization. Participants were 236 ethnically diverse, low-income biological mothers (M = 30.94 years; 50.0% Latina, 16.9% Caucasian, 13.1% African American, and 16.9% multiracial) of children aged 0 to 6 years. Mothers were classified into four groups based on whether they had experienced early childhood victimization and physical IPV victimization during pregnancy with the target child. Multinomial logistic regressions, controlling for demographic characteristics, examined whether a pregnancy not planned and prenatal substance use predicted group membership. Compared to mothers with early victimization only, mothers with both early childhood victimization and physical IPV during pregnancy were more than 3 times as likely to report that their pregnancy with the target child was not planned. In follow-up analyses, mothers with early victimization and physical IPV during pregnancy also reported higher lifetime parity than mothers with physical IPV during pregnancy but no early victimization. Early childhood victimization may place women on a risk pathway to physical IPV during pregnancy, particularly if the pregnancy is not planned. Prevention and policy efforts should screen women for early childhood victimization to understand risks for physical IPV during pregnancy.