Figure 1.

Mother–infant pair enrolment. The main reasons for ineligibility were not breastfeeding at discharge (n = 1102), newborn's transfer to neonatal intensive care unit (n = 86), inability to speak French (n = 66), birthweight <2500 g (n = 57), gestational age <37 weeks (n = 56), multiple pregnancy (n = 33), mother's transfer to intensive care unit (n = 13), psychosocial problems incompatible with successful follow‐up (n = 11), mother's age <18 (n = 7), other or unspecified (n = 55).