Agradeço a Deus pelo discernimento e sabedoria e por poder contar com pessoas especiais, as quais contribuíram muito para a finalização desse trabalho.À minha filha Maria Ilídia, companheira no corre-corre do cotidiano e pela sua existência.Aos meus pais, pelas orações e apoio.À minha madrinha, respeito, amizade e gratidão.Ao prof. Dr°. Alexandre Vaz Pires, pela oportunidade, apoio e paciência; lhe tenho muito respeito e eternamente serei grata.À prof. Dr ₐ . Ivanete Susin, pela atenção, simpatia e respeito.Ao Delci e Filipe, os quais deram início a este trabalho.Ao pai da minha filha, José Alípio, agradeço pelo incentivo a busca do conhecimento e pelo apoio durante a parceria. The objective of this study was to evaluate the influence of dam supplementation on least trimester of gestation of Nellore cows and creep-feeding supplementation on productive and reproductive performance of heifers. For this purpose, a factorial arrangement (2X2) was used, which the factor I was dam supplementation of cows in the least trimester of gestation (n = 350) and the factor II was creep-feeding supplementation (n = 153). Cows were supplemented with 0.5 kg of soybean meal by 90 days before partum, and the female calves were supplemented in creep-feeding from 30 days after birth until weaning at 6.38 months of age. The experimental period comprised the least trimester of gestation up to 30 months of age. There was no interaction between supplementations on body weight (P = 0.66) and BCS (P = 0.58) of cows, and on body weight (P = 0.62), and ADG (P = 0.73) of heifers from 1.2 to 26.0 months. In the same way, there was no effect of dam supplementation (P = 0.98), and creep-feeding (P = 0.78) on body weight of heifers. However, dam supplementation exerted punctual influence on body weight of heifers at 24.9 months of age, when heifers that dam were supplemented were heavier (P = 0.040). The reproductive parameters such puberty rate at 12.5 (P = .31) and 24.9 (P = 0.75) months and the pregnancy rate at 18.7 (P = 0.86) and 26.0 (P = 0.36) months were not influenced by any nutritional strategies. However, there was interaction between supplementations on the pregnancy rate at 30 months of age, which heifers from cows that received supplement on least trimester of gestation and were submitted to creep-feeding showed higher pregnancy rate (92%, P = 0.019) than heifers who received only one of two types of supplementation. The association between dam supplementation and creep-feeding did not affect body weight, ADG, and puberty onset in Nellore heifers.