Preliminary results of the attachment-based STEEP(TM) (Steps toward effective and enjoyable parenting) research practice project "WiEge" are presented. Within a multisite, longitudinal intervention study, young high-risk mothers enrolled in the 2-year STEEP(TM) program have developed significantly more secure attachment relationships with their 1-year old children compared to mothers of the control group, who received the standard support as usual in the German welfare system. Age of mothers at birth of their children, educational level, single motherhood status, and mental health diagnoses indicate that both groups are comparable. A global measure of risk status indicates that mothers of the STEEP(TM) group confront even more risks than control group mothers. Additional data on depression (Edinburgh postnatal depression scale, EPDS), parenting stress (PSI), or risky parental attitudes (Adult-Adolescent Parenting Interview®, AAPI) are being presented and discussed with regard to the differences found being an effect of the STEEP(TM) program. Since the focus of the STEEP(TM) program is on empirically validated mechanisms in attachment development, it is also important that the results are in line with attachment theory. At the same time, we did not find significant group differences with regard to attachment disorganization. Supporting mothers in being more sensitive and to improve on reflective functioning--as being done in STEEP(TM)--does not seem to be sufficient to prevent attachment disorganization, as others studies have also shown. Although based on small sample sizes, the results are informative for improving intervention strategies, which need to focus more on the developmental process underlying attachment disorganization, i.e., unusual parental behavior.