World Health Organization (WHO) recommends to continue breastfeeding until two years of age. There are few studies assessing the correlation between breastfeeding duration and motor development. A cross-sectional study was conducted in April 2016 in Muara Batang Gadis District. The sample were children 3-6 years of age. Breastfeeding duration was obtained by interview, and motor development was assessed using Denver Developmental Screening Test II. Chi-square test was used to evaluate the correlation between breastfeeding duration and motor development, with P-value <0.05 and 95% Confidence Interval (CI). Among 204 children, 5.4% had the fine motor delay, and 1% had the gross motor delay. Children with breastfeeding duration for at least for two years had better fine motor development compared to breastfeeding duration for less than two years (P<0.001, PR=1.139, 95% CI=1.055-1.231) and there is no difference in gross motor development (P=0.193, PR=1.023, 95% CI=0.991-1.055). There is a correlation between breastfeeding duration and fine motor development.
                        
                        
                        
                        
                            
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