Dominant follicle removal by ultrasound guided transvaginal aspiration and superovulatory response in Nellore cows

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Cluster analysis and artificial neural network on the superovulatory response prediction in mice

Complex biological systems require sophisticated approach for analysis, once there are variables with distinct measure levels to be analyzed at the same time in them. The mouse assisted reproduction, e.g. superovulation and viable embryos production, demand a multidisciplinary control of the environment, endocrinologic and physiologic status of the animals, of the stressing factors and the conditions which are favorable to their copulation and subsequently oocyte fertilization. In the past, analyses with a simplified approach of these variables were not well succeeded to predict the situations that viable embryos were obtained in mice. Thereby, we suggest a more complex approach with association of the Cluster Analysis and the Artificial Neural Network to predict embryo production in superovulated mice. A robust prediction could avoid the useless death of animals and would allow an ethic management of them in experiments requiring mouse embryo.

Plasma concentrations of progesterone, 17 beta-estradiol and androstenedione and superovulatory response of nelore cows (Bos indicus) treated with FSH

Progesterone (P-4), 17 beta- estradiol (E2) and androstenedione (A4) plasma concentrations were correlated with palpated corpora lutea (CL), recovered embryos and viable embryos in 13 Nelore cows induced to superovulate with FSH, starting on Day 10 of the estrous cycle. Administration of FSH increased the number of ovulations and recovered embryos. Plasma P4, E2 and A4 levels on Day O and of P4 on Days 10 and 11 of the cycle were not correlated with the superovulatory response. Determination of CL by palpation per rectum was used to estimate the number of recovered embryos. Plasma P4 levels higher than 1 ng/ml on the induced estrus day (Day 14) had an adverse effect on the embryo viability rate. Plasma E2 concentrations on Day 14 were positively correlated with the number of viable embryos collected, a correlation that has not been previously reported. The present data indicate that plasma P4 and E2 concentrations in FSH-PGF2 alpha-treated Nelore cows are useful for the identification of 2 different populations of Nelore donors and are correlated with superovulatory response and, particularly, with the number of viable embryos.

Comparação entre doses constantes e decrescentes de extrato de pituitária eqüina na indução de superovulacão em éguas

Pós-graduação em Medicina Veterinária - FMVZ

Viabilidade pós criopreservação de embriões de novilhas nelore suplementadas com gordura protegida ruminal

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Fatores que influenciam a produção de embriões de vacas Nelore (Bos taurus indicus) superovuladas

Pós-graduação em Medicina Veterinária - FCAV

Avaliação da dinâmica folicular em éguas superovuladas com extrato de pituitária eqüina e FSH eqüino purificado

Pós-graduação em Medicina Veterinária - FMVZ

Estudo do fluido folicular, transporte, recuperaçao e maturação de oócitos em éguas superovuladas com estrato de pituitária equina

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Efeito da somatotrofina recombinante bovina (rbST) sobre a resposta superovulatória e recuperação embrionária em éguas tratadas com extrato de pituitária equina (EPE)

Pós-graduação em Medicina Veterinária - FMVZ

A diet enriched in linoleic acid compromises the cryotolerance of embryos from superovulated beef heifers

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

In vivo embryo production in cows superovulated 1 or 2 days after ovum pick-up

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)