A5009923543- Reproductive Physiology in Livestock
- Reproductive Biology and Fertility
- Genetic and phenotypic traits in livestock
- Effects of Environmental Stressors on Livestock
- Animal Genetics and Reproduction
- Ovarian function and disorders
- Ruminant Nutrition and Digestive Physiology
- Sperm and Testicular Function
- Fibroblast Growth Factor Research
- Reproductive System and Pregnancy
- Pluripotent Stem Cells Research
- Kruppel-like factors research
- Neuroendocrine regulation and behavior
- Hypothalamic control of reproductive hormones
- Assisted Reproductive Technology and Twin Pregnancy
- Agriculture and Farm Safety
- Birth, Development, and Health
- Endometriosis Research and Treatment
- Estrogen and related hormone effects
- Bioenergy crop production and management
- Animal health and immunology
- Medical and Health Sciences Research
- Plant tissue culture and regeneration
- Genetic Mapping and Diversity in Plants and Animals
- Cancer Risks and Factors
Universidade Estadual Paulista (Unesp)
2011-2024
Universidade Federal de Sergipe
2024
Universidade de São Paulo
2004-2015
Medecell (Brazil)
2010
Universidade Estadual de Maringá
2010
University of Florida
1990-1994
Cornell University
1990
A series of experiments with Holstein heifers was conducted to develop the capability inducing accessory corpus luteum (CL) a GnRH agonist (Buserelin, 8 µg; GnRHa) or hCG (3,000 IU) increase plasma progesterone concentrations (Exp. 1, 2, and 3) test whether induction CL will conception rates in 4) lactating cows 5). In Exp. were treated on d 5 after estrus GnRHa (n = 8) saline 7); 2 received 5) 5. Experiment 3 allowed contemporary evaluation 6), at time induced ovulation The equally...
Paracrine cell signaling is believed to be important for ovarian follicle development, and a role some members of the fibroblast growth factor (FGF) family has been suggested. In present study, we tested hypothesis that FGF-8 its cognate receptors (FGFR3c FGFR4) are expressed in bovine antral follicles. RT-PCR was used analyze Fgf8 , Fgfr3c Fgfr4 mRNA levels oocytes, granulosa theca cells. expression detected oocytes cells; this pattern differs from reported rodents. Granulosa cells, but not...
Heat stress is an important cause of poor development and low survival rates in bovine embryos. Experiments were conducted to test the hypothesis that Bos indicus embryos are more resistant heat than taurus In experiment 1, Nelore Jersey from oocyte pick-up-derived oocytes submitted (96 hours post-insemination, 41 °C, 6 hours), developmental ratios assessed at Day 7 (Day 0 = day fertilization), blastocysts frozen for RNA extraction. Experiment 2 evaluated expression COX2, CDX2, HSF1, PLAC8...
To determine whether injection of hCG or GnRH-agonist on d 5 after estrus (d 0) has a differential functional effect an induced and the original corpus luteum (CL), two experiments were conducted. In Exp. 1, nonlactating Holstein cows injected with saline (n = 4; T1), (Buserelin®, 8 μg i.m.; n T2), (1,000 I.U., i.v., 2,000 T3). Induced CL removed 13 weights different (GnRH-agonist < hCG). vitro production progesterone by tissue (μg/g; μg/CL) was affected treatment hCG) dose LH (ng.mL) in...
Introdução: A sífilis, uma IST causada pela bactéria Treponema pallidum, é um problema de saúde pública relevante, especialmente entre gestantes. falta tratamento adequado pode levar à sífilis congênita, com graves consequências para o feto. Apesar exames acessíveis, como VDRL, e tratamentos eficazes, barreiras no acesso falhas diagnósticas mantêm sua alta prevalência. Objetivos: Identificar perfil epidemiológico gestantes reportadas 2018 2022 em Imperatriz Maranhão, realizar análise...
For the purpose of collecting active ovarian structures for cell culture, unilateral ovariectomy (n = 34 ovaries) was performed per vagina on 17 dairy cows having normal estrous cycles, bilateral 9 18 cows, and corpora lutea 13) were removed from 11 beef cycles. None clinically ill after operation. Nine 37 developed adhesions both uterine horns body uterus. Three instruments used to perform colpotomy. The described surgical technique removal ovaries or is practical inexpensive, has low...
Abstract In cattle, most evidence suggests that granulosa cells express LH receptors (LHR) after (or as) the follicle becomes dominant, however there is some suggestion from smaller pre‐dominant follicles may several LHR mRNA splice variants. The objective of this study was to measure expression in bovine defined size and steroidogenic ability, small (<6 mm diameter) undergoing differentiation vitro. Semiquantitative RT‐PCR demonstrated undetectable <7 diameter (nondominant follicles),...
The binding of [3H]oxytocin ([3H]-0T) and [3H] arginine vasopressin ([3H]-AVP) by bovine endometrial myometrial membrane preparations obtained on days 0, 7, 14, 17, 21 after estrus or mating was investigated. [3H]0T bound with higher affinity than [3H]AVP both tissues; the mean dissociation constants (Kds) were 0.95 x 10-9 M 1.56 for OT AVP, respectively, P < 0.0001, no significant variations in Kds during cycle. concentration sites average 50% across cycle tissues. Endometrial receptor...
The objective was to evaluate reproductive tract development (ovary and uterus) onset of puberty in two lines Nellore heifers (Bos indicus) selected for postweaning weight. A total 123 heifers, including 46 from the control line (NeC) 77 selection (NeS) were used. Every 18 21 days 12 24 months age, average ovarian area (OVA), endometrial thickness (ETh), diameter largest follicle each ovary evaluated (using transrectal ultrasonography), body weight, hip height, condition score measured....
The objectives of this study were to determine the interval from ovulation deviation and diameter dominant (DF) largest subordinate (SF) follicles at in buffalo (Bubalus bubalis) heifers. Two methods evaluation (observed vs. calculated) used. FSH LH profiles encompassing follicle (Experiment 1), follicular when DF acquired ovulatory capacity 2) also determined. time SF did not differ between observed calculated methods. Overall, occurred 2.6 ± 0.2d (mean SEM) after ovulation, diameters 7.2...