Results
During the period of midwives’ activity in the course of the survey, 1,492 mothers gave birth and 1,109 (74.3%) could be approached (Flowchart of inclusion criteria, south-eastern France, November 2021–April 2022MI: motivational interview.

During the study period, 1,492 mothers gave birth and 1,109 (74.3%) could be approached. All participants who completed the pre-questionnaire (T0) were included in intention-to-treat (ITT) analyses, while only those who completed both pre- and post-questionnaires (T1) were included in the per-protocol (PP) sensitivity analyses.Participants were randomly assigned to the control group (leaflet, n = 371) and the intervention group (MI, n = 365). In the control group, 370 participants (99.7%) completed the T0 questionnaire and 334 (90.0%) the T1; these figures in the intervention group were 363 (99.5%) and 322 (88.2%), respectively. In total, 733 mothers were included in the ITT analyses and 656 in the PP analyses.