This study reviews the factors affecting reproductive efficiency in PAC pigs and identifies the major constraints in traditional pig production systems in relation to climatic environment, nutrition and management practices in the hills of eastern Nepal.The majority of the pigs in the hills of Nepal are reared below their LCT throughout the year, causing estimated loss of 43%of the total feed intake requirements by climatic penalty. If this feed loss could be effectively utilised by improving housing conditions, the productivity of pigs could be greatly improved. Improvement in housing...