Fig. 1.

Participant flow through the study. Note. ^aExcluded when medical conditions were detected. The medical conditions for exclusion were as follows: stillbirth (n = 1), delivery before 37 weeks of gestation (n = 23), birth weight under 2,500 g (n = 38), admission to NICU (n = 8), cleft palate in the infant (n = 1), transfer to other hospital of the mother (n = 3) or infant (n = 7), being under medical care for depression (n = 1), prevention from breastfeeding (n = 7) and/or separation from infant (n = 4) for more than 24 h. The total numbers do not equal the sum of those in the flow chart because of overlapping conditions