Effect of sex on survival of bovine in vitro produced embryos vitrified by Cryotop.

Proceedings of the 31st Annual Meeting of the Brazilian Embryo Technology Society (SBTE); Cabo de Santo Agostinho, PE, Brazil, August 17th to 19th, 2017. Abstract

Valores de zinco no plasma seminal e soro sanguineo de bovinos puberes da raça Nelore relacionados as características espermaticas de desenvolvimento reprodutivo.

O estudo estabeleceu o nivel do Zinco e fosfatase acida e alcalina no plasma seminal em relacao ao desenvolvimento reprodutivo de 13 machos da raca Nelore, desde os dez meses de idade ate a puberdade, criados em pastagem Brachiaria brizantha, recebendo sal mineralizado ad libitum

Capacidade reprodutiva do touro de corte: funções, anormalidades e fatores que a influenciam.

Fisiologia anatômica do sistema reprodutivo do touro. Avaliação da capacidade reprodutova do touro. Principais anormalidades que comprometem a capacidade reprodutiva. Influência da nutrição, idade e manejo da capacidade reprodutiva

The effect of pre-maturation culture using phosphodiesterase type 3 inhibitor and insulin, transferrin and selenium on nuclear and cytoplasmic maturation of bovine oocytes.

This study aims to evaluate if a pre-maturation culture (PMC) using cilostamide as a meiotic inhibitor in combination with insulin, transferrin and selenium (ITS) for 8 or 24 h increases in vitro embryo production. To evaluate the effects of PMC on embryo development, cleavage rate, blastocyst rate, embryo size and total cell number were determined. When cilostamide (20 M) was used in PMC for 8 or 24 h, 98% of oocytes were maintained in germinal vesicles. Although the majority of oocytes resumed meiosis after meiotic arrest, the cleavage and blastocyst rates were lower than the control (P 0.05) to the control. The deleterious effect of 20 M cilostamide treatment for 24 h on a PMC was confirmed by lower cumulus cell viability, determined by trypan blue staining, in that group compared with the other groups. A lower concentration (10 M) and shorter exposure time (8 h) minimized that effect but did not improve embryo production. More studies should be performed to determine th