Abstract: To evaluate the body weight and Body Condition Score (BCS) and reproductive performance, 45 multiparous Holstein cows of 3.6±1.6 years of age, 2.2±1.2 calving, of 610.6±46.7 kg prepartum weight and of 3.5±0.37 BCS were used, allotted in: T1 (n = 15) where cows were supplemented orally with 500 mL day–1 of vegetable oil and T2 (n = 15) with 250 mL day–1, 15 days before calving and up to 30 days after calving and T3 (n = 15) control. The pp weightamong treatments was similar (p>0.05) in the periods evaluated, except at 60 d pp in T3. BCS was the same (p>0.05) among groups per periods; except in T3 at 15 d pp. Most weight loss and BCS happened until 45 days pp. The average P4 at 15 dpp, in all three treatments were <1 ng mL–1, then 1.2, 1.6 and 2.0 ng mL–1 were recorded at 30, 45 and 60 dpp, respectively. Ovarian activity was not different among treatments (p> 0.05). 46% of cows presented levels >1 ng mL–1 of P4 15 d pp, at 30 d pp 57.7 and 69% at 45 and 60 d pp. The interval calving-first oestrus was different (p<0.05) in T3, 36.2±5 d vs 64.5±38 and 50.4±23.9 d for T1 and T2, respectively. Calving interval for T3 was different (p<0.05) from T1 and T2, 343.2±25.4 vs 385±71 and 393±60 d pp. Although, there was no difference in weight and BCS per treatment, a good calving interval was achieved; the energy supplementation can be done from 15-45 days postpartum in dairy cows.