A5039155059- Reproductive Biology and Fertility
- Reproductive Physiology in Livestock
- Animal Genetics and Reproduction
- Sperm and Testicular Function
- Genetic and phenotypic traits in livestock
- Ovarian function and disorders
- Effects of Environmental Stressors on Livestock
- Animal Behavior and Welfare Studies
- Ruminant Nutrition and Digestive Physiology
- Malaria Research and Control
- Mosquito-borne diseases and control
- Reproductive biology and impacts on aquatic species
- Xenotransplantation and immune response
- COVID-19 Clinical Research Studies
- Reproductive Health and Technologies
- Rabbits: Nutrition, Reproduction, Health
- Ectopic Pregnancy Diagnosis and Management
- Aquaculture Nutrition and Growth
- Vitamin C and Antioxidants Research
- Tissue Engineering and Regenerative Medicine
- Pluripotent Stem Cells Research
- Long-Term Effects of COVID-19
- Viral Infections and Vectors
- Seed Germination and Physiology
- Reproductive System and Pregnancy
University of Zulia
2007-2024
St. George's University
2021-2024
University of Georgia
2001-2005
Reproductive Biology Associates
2001
West Virginia University
2000
Experiments were conducted in beef cows without a primary CL, which pregnancy had been maintained with exogenous progestogen. In preliminary trials, replacement CL induced ipsilateral to the embryo and after, rather than before, d 36 of pregnancy, more pregnancies after withdrawal progestogen (13/13 vs 2/6; P < 0.05). Exp. 1, by treatment hCG on 28 flunixin meglumine 31 through 37 did not increase maintenance pregnancy. Experiment 2 was evaluate directly effects concentrations PGF2alpha...
Numerous studies have shown the influence of moon cycle on biological functions in farm animals, suggesting that predicting calving distribution could enhance survival rates by improving management practices animal production. This study builds previous research examining impact lunar frequency, gestation length, birth weight, and calf sex artificially inseminated cows. We analyzed 121,276 records from dual-purpose crossbred cows across 36 farms along western margin Lake Maracaibo basin,...
Contents The association between conception rate at first service and numbers of follicles developed during a follicular wave was examined in 102 suckled beef cows 14 heifers. Follicular development monitored using ultrasonography for either two (trial 1) or three 2) consecutive oestrous cycles (pre‐breeding, breeding post‐breeding equivalent). Animals were on alternate days from day 6 after oestrus (day 0) until ovulation insemination next 24 pregnancy observed twice daily inseminated...
Evidence has accumulated over the years indicating that moon influences some aspects of reproductive activity in animals and humans. However, little is known about influence lunar cycle on performance cows under tropical conditions, where environment strongly affects reproduction. This retrospective study was conducted with aim assessing traits crossbred managed a pasture-based system. Data from 5869 records two commercial farms localized Maracaibo Lake Basin Zulia State, Venezuela, were...
There is currently innumerable evidence showing that the lunar cycle affects various reproductive aspects in farm animals. However, there very little information on effect of productive traits these species. A retrospective study was conducted (2015–2018) to evaluate influence some and a guinea pig (Cavia porcellus) production system southern Andean region Ecuador. total 7352 records females housed 3 m2 cages with breeding male were analyzed. The following variables considered: offspring sex...
A robust body of evidence has demonstrated that the lunar cycle plays an important role in reproduction fish living natural environments. However, little is known about influence moon on tilapia reproductive activity intensive farming systems. This study aims to evaluate performance tilapias outdoor tropical production system Latin America. Records two strains (Nile [ Oreochromis niloticus; n = 75] and Red spp.; 1335]) reared concrete tanks a commercial farm were analyzed. Over 3-year...
Reproduction, Fertility and Development is an international journal publishing original research , review comment in the fields of reproduction developmental biology humans, domestic animals wildlife
Abstract We evaluated the relationship between plasma levels of anti-Müllerian hormone (AMH) and number antral follicles at restart follicular wave in crossbred Holstein cows reared under extensive grazing systems over 2500 m above sea level. The study included 140 from 15 farms that were average 75.3 ± 2.10 d post partum. Animals synchronized according to following regime: day 0 = intravaginal progesterone releasing device (IPD) + estradiol benzoate (EB); 7: withdrawal IPD prostaglandin; 8:...
In order to study the effect of an intravaginal device (sponge) impregnated with Medroxyprogesterone acetate (MAP) on estrus induction and fertility, assay was carried out a commercial farm located in Zulia state, Venezuela. Eighty-four noncyclic (milk progesterone level &lt;0.5ng/mL) suckled crossbred cows (B. taurus×B. indicus) at 60 days postpartum 3–3.5 body condition score (scale 1–5) were randomly allotted one following treatments: T1 (n=22), 250mg MAP during 7 days+50mg 5mg...
El experimento tuvo dos fases, la primera determinó relación entre el recuento de folículos antrales (RFA) y concentración hormona anti-mülleriana (AMH) valorada día reinicio onda folicular en 61 vaquillas Holstein mestizas, criadas ganaderías del trópico alto Ecuador. La segunda fase comparó RFA valorado aspiración ecoguiada (OPU); así como, cantidad calidad los complejos cumulus ovocito (COCs) recuperados animales con alta (n=8) baja AMH. sincronización se realizó benzoato estradiol más un...
Reproduction, Fertility and Development is an international journal publishing original research , review comment in the fields of reproduction developmental biology humans, domestic animals wildlife
Postpartum anestrus is the main reproductive problem that affects crossbred cattle production in Venezuela. (Soto et al., 2002 Theriogenology 57, 1503–1510; Soto 2000 Revista Científica FCV-LUZ 10, 391–398). In order to reduce postpartum and lower calving conception interval, 167 (Bos indicus×Bos taurus) anestrous cows between 90 130 days with body condition score 3 (scale 1–5) were randomly allotted one following treatments: 1) PH (n=59), intravaginal sponge (IS) impregnated 250mg of...