Maternal characteristics can affect a mother's decision to breastfeed. This study used a cross-sectional design to assess maternal variables and infant feeding patterns among nursing mothers attending an immunisation clinic in Ibadan, Nigeria. A total of 264 mothers who consecutively attended the immunisation clinic and met certain inclusion criteria were interviewed. A majority of mothers (204, 77.2%) were in the middle of the reproductive age span (24-35 years); 180 (68.2%) had attended tertiary educational institutions. Almost all the mothers (257, 97.3%) had good knowledge about exclusive breast-feeding. Exclusive breast-feeding decreased with the age of the infant; by six months of age, only 40% of infants were exclusively breastfed. Of the mothers who practiced exclusive breast-feeding, 30 (18.5%) initiated breast-feeding within 30 minutes after birth. There may be a need to increase the emphasis placed on the time that complementary feeding should be introduced. (Contains 3 tables.)