MyHealthyPregnancy (MHP) is an application that was developed using behavioral decision science principles. This study seeks to evaluate the effectiveness and efficacy of the application. MyHealthyPregnancy was offered to expectant mothers at the University of Pittsburgh Medical Center in conjunction with usual prenatal care. The primary objective is to compare the reduction in gestational age at birth between MHP and usual care cohorts. Secondary objectives include comparing births occurring prior to 37 weeks of gestation, depression rates, anxiety rates, referrals to behavioral health, referrals to social workers, preeclampsia rates, gestational weight gain, number of prenatal appointments attended, and percent of required prenatal appointments attended between the MHP and usual care cohorts.