The first counseling session lasted for approximately 1 h and was held at the maternity ward, individually, at different times for the mothers and grandmothers. The intervention with the grandmothers followed the same principles adopted for the mothers, however covering additional topics that underscored the role of grandmothers for a successful breastfeeding. Subsequent sessions were held at the participants’ homes at 7, 15, 30, 60, and 120 days postpartum, in the presence of both the mother and the grandmother, when cohabiting. The WHO principles of breastfeeding counseling were followed [19], namely, establishing a dialog between mothers, grandmothers, and health professionals on different aspects of breastfeeding, e.g., its importance; frequency and duration of feeds; recommended duration (6 months of exclusive breastfeeding and 2 years or more of any breastfeeding); factors that interfere with milk supply; breastfeeding techniques; consequences of dummy use and bottle-feeding; infant crying and communication; and specific doubts expressed by the mothers and/or grandmothers.