Objective: To examine factors associated with the physical growth of breast-fed Ghanaian infants during the ®rst 18 months of life. Design: A community-based longitudinal study. Setting: The study was carried out in Techiman, a district capital and major food trading center in the Brong Ahafo region of Ghana. Subjects: One-month old infants n 216 with birth weight ! 2X5 kg were recruited from Maternal and Child Health Centers. Method: From 6 to 12 months, infants were provided with one of four types of nutritionally enhanced complementary foods. Anthropometric assessments were completed monthly from 1 to 12 months and every other month from 12 to 18 months. Information was collected on household characteristics, morbidity from common infections and dietary intakes. Blood samples were collected at 6 and 12 months to assess iron, zinc, ribo¯avin and vitamin A status. Multiple regression analysis was used to examine factors associated with growth during the age intervals of 1 ± 6, 4 ± 6, 6 ± 12 and 12 ± 18 months as well as size attained at 12 and 18 months. Results: Prevalence of diarrhea and fever were negatively associated with growth during the ®rst year of life. No signi®cant relationship was found between respiratory illness (de®ned as cough or purulent nasal discharge) and growth. With the exception of dietary zinc intake, dietary variables were generally not signi®cantly associated with growth. Maternal education was positively associated with growth during most of the age intervals. Conclusion: These ®ndings suggest that interventions to reduce morbidity and improve the education of girls may bene®t children's growth in this population.