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An attempt was made to establish the effect of season, sex and period of farrowing on growth performance for Large White Yorkshire pigs. The data pertaining to achieve the objectives were collected between 2011 to 2016 at PGRIAS, Kattupakkam, on bodyweights at different ages of pigs with the Male and Female Large White Yorkshire pigs were included in the study. Based on the objective of the study, collected data was grouped into five equal periods (Period I: 2011 to 2012; Period II : 2012-2013; Period III : 2013-2014: Period IV: 2014-2015; Period V:2015-2016). To assess the seasonal fluctuations, ( Season I: March –June, Season II: July-October, Season III: November-February) seasonal factors were included in the study. The General Linear models was used in the analysis. The over all least squares mean for birth weight,56 days weight,120days,180 days weight,240 days weight were 1.401 ±0.05 kg, 7.749 ±0.06 kg, 25.244 ± 0.15 kg, 41.546 ± 0.03 kg, 75.847±0.12 kg respectively. The effect of sex was found as significant source of variation from birth to weaning. The period of farrowing and season of farrowing was not found as signifiacant source of variation on the body weights.

Key words: Growth Performance, Large White Yorkshire, Linear model