To assess mothers’ networks of known adopters of specific IYCF behaviors, we asked mothers whether they knew other mothers who had adopted optimal IYCF practices in the community, then to specify those individuals they knew personally (name of each person, place they lived, and relation to mother). We set the denominator as all mothers, first to calculate the percentage of mothers with known adopters, then quantified the number of people in their social network; if they did not know adopters, then the number was zero.