The objective of this study was to evaluate the effect of the follicular wave synchronization method on the superovulatory response of Girolando embryo donors. Seven cows and five heifers were divided into three treatments according to the method of the follicular wave synchronization prior to superovulation. The donors were superovulated with eight FSH decreasing doses, adding 133 mg per animal. The superovulatory response was evaluated using an ultrasound device to quantify the number of corpora lutea. The number and quality […]

The objective of this study was to evaluate the efficiency of cyclic and acyclic progesterone-treated recipient mares in a commercial embryo transfer program. Acyclic recipients were treated with decreasing amounts of estradiol cypionate (ECP® – Pfizer Saúde Animal, São Paulo, Brazil), followed by 1500 mg of a sustained-release progesterone injection (P4LA150® – Laboratórios B.E.T., Rio de Janeiro, Brazil). Out of all 1506 embryo recovery attempts performed, 59.36% were positive (894/1506). Pregnancy rates of cyclic and acyclic mares were, respectively, 44.12% […]

O objetivo nesta revisão é mostrar os principais avanços científicos obtidos na área da reprodução animal e como estes podem afetar a eficiência reprodutiva e produtiva do rebanho bovino brasileiro. Com o conhecimento dos mecanismos envolvidos no controle da fisiologia reprodutiva, em níveis endócrino, celular e molecular, foi possível o desenvolvimento das biotécnicas reprodutivas, destacando-se a IATF, que tem sido utilizada em larga escala, por permitir a multiplicação de animais superiores geneticamente, aumentar a taxa de natalidade e ser eficaz […]