The overall purpose of this study was to expand the area of focus from examinations of maladaptation to include the positive aspects of motherhood. Its main objective was to identify mothers who might demonstrate transformational growth as they transition from the prenatal to postpartum period. Participants were 467 primiparas and multiparas women who completed self-report measures on their subjective well-being (positive/negative emotions, life satisfaction) and psychological functioning (stress and coping, growth). Results demonstrated the presence of higher ratings of reward versus cost expectations with regard to parenting satisfaction. A unique subset of Highly Satisfied (HS) mothers was identified with lower negative emotions and higher positive emotions on pre-and post-birth ratings. Furthermore, HS group's scores on negative emotions decreased longitudinally, while their positive emotions spiraled upward. Logistic regression models were used to predict probability of HS group belonging. The term 'flourishing' was borrowed to distinguish mothers who were: (a) highly satisfied in parenting; (b) attained and accrued more positive and less negative emotions over time; (c) used fewer negative coping skills relative to positive ones; (d) described the strains of motherhood as an opportunity for personal gain; and (e) rated themselves as having experienced beneficial growth. This study is distinctive in applying positive psychology and developmental perspectives simultaneously to examine the domain of motherhood and to emphasize positive adaptation in mothers. It is also the first to propose a unique descriptor to the field of maternity for this phenomenon: Postpartum Flourishing.