The present study was designed to bring out the effects of antioxidant and increased energy allowance on reproductive performance and steroids during transition period in crossbred cow. Twenty six advanced pregnant crossbred cows of parity between 2 to 4 and lactation potential of >10 L/day were divided into two equal groups (n=13 cows/group). Cows were fed diets either (i) supplemented with vitamin E (80 IU/kg DM), Selenium (Se; 0.3 mg/kg DM) and increased energy allowance in the form of 20% extra concentrate (TRT) or (ii) basal diet without any supplementation as control (CON). Vitamin E and Se were supplemented with wheat flour bolus from -4 to 8 week of calving where energy allowance increased from 2 to 8 week of calving on daily basis to individual animal (where 0 is day of calving). Blood samples were collected on weekly interval from -4 to 8 week of calving. Post-partum reproductive performance was assessed in terms of service per conception, calving to conception interval, days calving to first AI, first AI pregnancy rate and relative reproductive disturbance in both the groups. In reproductive steroids, serum level of progesterone and estradiol were estimated through radio immuno assay (RIA). Marked favorable impact over fertility was recorded in TRT group through reduced service per conception, calving to conception interval, days calving to first AI and increased first AI pregnancy rate along with relatively less reproductive disturbance. However, study does not reveal any significant effect of vitamin E, Se and increased energy allowance on reproductive steroids.