Results
Of the 427 first-time mothers invited to participate in the study, 228 (53.4%) were included at T1. The number of participating first-time mothers, response rates at each time point, and the dropouts by intervention and control group are presented in the flow chart in Fig. Flow chart of first-time mothers at T1, T2, and T3, with reasons for dropoutsFirst-time mothers completed the measures in three languages. Norwegian was used by 95.6% (In the intervention group, non-respondents (