A5080587646- Reproductive Biology and Fertility
- Reproductive Physiology in Livestock
- Genetic and phenotypic traits in livestock
- Rabbits: Nutrition, Reproduction, Health
- Reproductive System and Pregnancy
- Selenium in Biological Systems
- Carcinogens and Genotoxicity Assessment
- Sperm and Testicular Function
- Effects and risks of endocrine disrupting chemicals
- Birth, Development, and Health
- Ovarian function and disorders
Universidade Estadual de Londrina
2019-2024
Universidade Estadual Paulista (Unesp)
2021
Centre d’histoire de Sciences Po
2021
We evaluated the effects of nulliparous, primiparous, and multiparous conditions on estrus pregnancy rates in females that did not show but were treated with gonadotropin-releasing hormone (GnRH) at time timed artificial insemination (TAI). Nelore (n = 531) allocated according to following categories: nulliparous 144), primiparous 132), 255). The animals received a conventional TAI protocol, expression was identified by absence paint sacrococcygeal region day TAI. Females 10 μg GnRH together...
The controversial data about antral follicle count (AFC) may be partially explained by the different criteria used to determine what is high, intermediate and low AFC. This study evaluated classification methods for AFC groups, relating them conception rate, dominant size body condition score (BCS) in cows submitted timed artificial insemination (TAI). Nelore (Bos indicus; n = 935), received a reproductive program consisting of TAI natural breeding. Conception BCS during were three...
The aim of this study was to evaluate the follicular development, morphological integrity, and oxidative stress preantral ovarian follicles from Bos taurus indicus females grown in vitro with ascorbic acid. Ovaries (n = 20) were collected, fragmented, cultured for 6 or 12 days minimum essential medium (MEM), MEM supplemented 50 100 ng/ml acid, an extracellular matrix agarose gel, incubator at 38.5°C; every 2 days, 100% culture replaced. data analyzed using chi-squared test and/or Fisher's...
The goal of this study was to determine the distribution preantral follicles in bovine ovaries. Follicular ovaries (n = 12) evaluated region greater curvature ovary (GCO) and close ovarian pedicle (OP) Bos taurus indicus heifers Nelore breed. Two fragments were obtained from each (GCO OP). mean weight 4.04 ± 0.32 g. antral follicle count (AFC) 54.58 3.55 (minimum maximum variation 30 71 follicles, respectively). In total, 1123 visualized GCO; 949 (84.5%) them primordial 174 (15.5%)...
A progesterona (P4) é um dos principais hormônios responsáveis pela ciclicidade reprodutiva e atua na manutenção da gestação em vacas. Esse hormônio caracteriza-se rápida metabolização, o que leva a necessidade de disponibilizá-lo forma lenta fim mimetizar sua liberação fisiológica. Diferentes dispositivos progestágenos associados à aplicação ésteres estrógeno são utilizados com frequência protocolos para sincronizar as ondas foliculares ovulação. Entre os liberadores progestágenos, mais...
Melhorar o desempenho reprodutivo é importante para aumentar a lucratividade das propriedades. Assim, nós avaliamos contagem de folículos antrais (CFA), escore condição corporal (ECC), peso vivo e comportamento animal sobre à taxa concepção vacas Brahman submetidas inseminação artificial em tempo-fixo (IATF). Vacas (n=122) receberam um protocolo convencional IATF três manejos (D0, 8 10) base estrógeno progesterona, além do monitoramento da expressão estro antes inseminação. O ECC foram...
The aim of this study was to evaluate the oxidative stress in ovaries and corpus luteum (CL) Bos taurus indicus females oxidant effect CL ovarian tissues regions near, intermediate, or distant from it. Ovaries (n=12) Nelore heifers (n=6) were collected a slaughterhouse fragmented. Experiment 1, each ovary obtained three fragments, resulting 18 fragments with (OV+CL) another without (OV-CL). Three generated CL, totaling fragments. In experiment 2, removed specific CL. All placed...