A total of 26 purebred Sahiwal cows, 13 cows each from two farms i.e. the BMEF and CBF, Anjora, Durg, Chhattisgarh were studied during extended transition period (56 days prepartum to 84 days postpartum) to investigate variation in body condition score along with birth weight of calf, early lactational yield, postpartum interval to estrus (PPIE) and their interrelationships. In BMEF herd concentrate was not fed to the animals during prepartum stage. In BMEF, the mean BCS at periodical intervals was signifi cantly less than that of CBF herd throughout the transition period. The postpartum mean unit loss in BCS of the cows of BMEF herd (0.54±0.09) was signifi cantly higher than that of CBF cows (0.52±0.09). Significant differences were observed between overall pre- and post-partum means of BCS of each farm. Significantly higher early lactation yield was observed in the Sahiwal cows of CBF (667.23±37.13 kg) than the cows of BMEF herd (476.92±51.59 kg). The average PPIE was nonsignificantly shorter in CBF cows (228.69±37.36 days) than those of the cows of BMEF herd (241.69±43.51 days). The average

birth weight of calf of CBF herd (22.38±0.75 kg) was significantly higher than that of BMEF cows (19.58±0.52 kg). Highly significant (P<0.01) positive correlations were observed between the mean pre- and post-partum BCS with all periodical BCS at different intervals including mean pre- and post-partum BCS in both farms. Early lactation yield has shown negative and non signifi cant correlation with 84 days postpartum BCS in both farms. PPIE was negatively correlated with BCS at 56 and 84 days postpartum in both the farms. PPIE had shown positive correlation with early lactation yield in BMEF (r=0.377) and negative correlation in CBF herd (r=-0.182). It can be concluded that the energy status can be assessed by scoring of body condition periodically in transition Sahiwal cows which were indicative of their early lactation yield, interval to first detected heat and birth weight of calf.