A5079317042- Reproductive Physiology in Livestock
- Reproductive Biology and Fertility
- Genetic and phenotypic traits in livestock
- Ovarian function and disorders
- Sperm and Testicular Function
- Effects of Environmental Stressors on Livestock
- Ruminant Nutrition and Digestive Physiology
- Animal Genetics and Reproduction
- Birth, Development, and Health
- Assisted Reproductive Technology and Twin Pregnancy
- Soil Management and Crop Yield
- Rural Development and Agriculture
- Coenzyme Q10 studies and effects
- Growth and nutrition in plants
- Veterinary Equine Medical Research
- Biochemical Acid Research Studies
- Milk Quality and Mastitis in Dairy Cows
- Cardiovascular Conditions and Treatments
- Bee Products Chemical Analysis
- Water Systems and Optimization
- Effects and risks of endocrine disrupting chemicals
- Rural and Ethnic Education
- Cardiovascular Function and Risk Factors
- Vector-Borne Animal Diseases
- Animal Virus Infections Studies
Universidade Estadual de Londrina
2016-2025
Universidade Norte do Paraná
2023-2025
Division of Undergraduate Education
2021
Centre d’histoire de Sciences Po
2021
Universidade Estadual de Maringá
2008-2012
Contents Interest in indicus–taurus cattle has been increasing, as these animals are likely to present the best characteristics of Z ebu and E uropean bovine breeds. The aim this study was compare embryo production donors with high vs low antral follicle counts obtained by ovum pickup / vitro ( OPU IVP ) superovulation SOV )/embryo collection. Braford females at weaning age (3/8 N elore × 5/8 Hereford, n = 137, 9 ± 1 month old) were subjected six serial ovarian ultrasonographs assigned two...
Obtaining sexed sperm from previously frozen doses (reverse-sorted semen [RSS]) provides an important advantage because of the possibility using bulls with desired genetic attributes that have died or become infertile but whom is available. We report efficiency RSS on pregnancy rate and birth calves in a large-scale program ovum pick-up vitro embryo production (IVEP) Bos indicus, indicus-taurus, taurus cattle. From 645 procedures (Holstein, Gir, Nelore), 9438 viable oocytes were recovered. A...
This study evaluated the effects of synchronization ovarian follicular wave emergence on efficiency in vitro embryo production. Bos indicus cows (n = 20) were divided into two groups (control vs. synchronization) and subjected to repeated ovum pick-up (OPU) sessions (8 replicates each, with an interval 21 days a 2 × crossover design) subsequent Cows control group 10) submitted OPU procedures without any stimulation every days. Animals received protocol-based progesterone implant, estradiol...
The aim was to examine the effect of embryo-uterine synchrony on conceptus elongation and pregnancy rate in cattle. In Study 1, crossbred beef heifers each received 10 Day-7 vitro-produced blastocysts either Day 5, 7 or 9 after oestrus. A proportion 5 recipients were supplemented with progesterone, via a progesterone-releasing intravaginal device from Days 3-5 plus 750IU equine chorionic gonadotrophin 3000IU human 3. At embryo age 14, all slaughtered uterus flushed. Fewer yielded conceptuses...
Abstract We evaluated the effect of antral follicle count (AFC) on ovarian follicular dynamics, pregnancy rates, progesterone concentrations, and transcriptional patterns genes in Nelore cattle ( Bos taurus indicus ) after a timed artificial insemination (TAI) programme. Cows were separated based AFC, those with high AFC showed larger (P < 0.0001) diameter area than very low AFC. Females exhibited 0.01) dominant at TAI (13.6 ± 0.3 vs. 12.2 0.4 mm) tendency = 0.06) to have different serum...
This study was conducted to evaluate the influence of category (heifers, primiparous or multiparous cows) on pregnancy rates in a large scale resynchronization ovulation program.Nelore heifers (n = 903), lactating cows 338) and 1,223) were synchronized using conventional protocol estradiol/P4-based fixed-time artificial insemination (FTAI).Thirty days after ultrasonography, females who failed first FTAI resynchronized with same hormonal prior second FTAI.The status each cohort evaluated by...
The antral follicle count (AFC) represents the number of follicles visualized by ultrasonography in ovaries.Antral tends to be variable among cows but with high repeatability within same individual.In last decade, AFC has been considered a biological marker fertility many positive aspects reproductive efficiency for those animals AFC.For instance, larger and better-quality embryos, better pregnancy rates, increased concentrations circulating progesterone, addition other characteristics...
This study aimed to evaluate the effect of prostaglandins on proportion inflammatory cells (PMN) and postpartum pregnancy rates in cows subjected fixed-time artificial insemination (FTAI) programs. In total, 209 Nelore were used this study. Females separated into three groups receive following treatments: control group- CTL (n = 66), females that not treated; group 0.5 PG 68), received cloprostenol 0.5mg – a PGF2α analog; 1.0 75), 1mg cloprostenol. All FTAI protocol at an average 38.7 ± 7.6...
Reproductive biotechniques such as embryo production are important tools to increase the reproductive performance in cattle a short time.In this context, antral follicle count (AFC), which reflects population of follicles present an ovary, has been indicated phenotypic characteristic related female fertility and closely correlated vivo vitro (IVEP).A positive correlation was evidenced between AFC oocyte retrieval by ovum pick up (OPU) sessions with number embryos produced.Several studies...
Oxidative stress (OS) induced by an imbalance in reactive oxygen species (ROS) levels vitro impairs embryonic development. Here, we assessed the effects of alpha-lipoic acid (ALA) production media on OS reduction, development, and cryotolerance bovine embryos. We evaluated adding different concentrations ALA (2.5, 5, 10, 25 μM) to maturation (IVM) or culture (IVC) medium also determined (25 IVM IVC same routine development quality embryos, ROS levels, cryotolerance. Embryos were produced...
This study aimed to evaluate the effect of prostaglandins on proportion inflammatory cells (PMN) and postpartum pregnancy rates in cows subjected fixed-time artificial insemination (FTAI) programs. In total, 209 Nelore were used this study. Females separated into three groups receive following treatments: control group- CTL (n = 66), females that not treated; group 0.5 PG 68), received cloprostenol 0.5mg – a PGF2α analog; 1.0 75), 1mg cloprostenol. All FTAI protocol at an average 38.7 ± 7.6...
Contents The objective was to compare populations of antral and pre‐antral ovarian follicles in B os indicus ‐ taurus cows with high low follicle counts. Nelore ( indicus, n = 20) X Angus (1/2 indicus‐taurus, were subjected follicular aspiration without regard the stage their oestrous cycle (day D 0) remove all ≥3 mm induce growth a new wave. Ovaries examined by ultrasonography on 4, 19, 34, 49 64, counted. Thereafter, assigned one two groups: or count AFC , ≥30 ≤15 follicles, respectively)....