A5009208820- Reproductive Physiology in Livestock
- Genetic and phenotypic traits in livestock
- Effects of Environmental Stressors on Livestock
- Ruminant Nutrition and Digestive Physiology
- Animal Behavior and Welfare Studies
- Reproductive Biology and Fertility
- RNA Interference and Gene Delivery
- Reproductive System and Pregnancy
- melanin and skin pigmentation
- Vector-Borne Animal Diseases
- Pregnancy-related medical research
- Ovarian function and disorders
- Adipose Tissue and Metabolism
- Neonatal Respiratory Health Research
- Research in Social Sciences
- Artificial Intelligence in Healthcare and Education
- Coconut Research and Applications
- Veterinary Equine Medical Research
- Veterinary medicine and infectious diseases
- Animal Disease Management and Epidemiology
- Animal health and immunology
- Insurance, Mortality, Demography, Risk Management
- Context-Aware Activity Recognition Systems
- Congenital Diaphragmatic Hernia Studies
University of British Columbia
2014-2024
University of Guelph
2021-2024
University of Utah
2001-2004
The objective of this study was to evaluate the effects use intravaginal probiotics prepartum on incidence risk metritis postpartum and conception after first artificial insemination (AI). A total 606 Holstein cows were enrolled 3 wk before their expected calving date from 2 farms. Cows randomly assigned either receive a 2-mL dose combination lactic acid bacteria (probiotic treatment) washed with approximately mL sterile saline solution, into vaginal canal twice weekly until parturition, or...
The aim of this study was to determine the association between concentrations progesterone (P4) during previous estrous cycle with intensity spontaneous or estrogen-induced expression and pregnancy per artificial insemination (P/AI) . A total 1,953 AI events from lactating Holstein cows were used, consisting 1,289 timed experiment 1 (Exp. 1) 664 2 2) In Exp. 1, bred after a protocol based on estradiol P4. animals upon estrus detection. both experiments continuously monitored by an automated...
The aim of this study was to determine the association between occurrence and intensity estrous expression with pregnancy success in recipient lactating dairy cows subjected embryo transfer (ET). Two observational studies were conducted. Holstein synchronized using same timed ET protocol, based on estradiol progesterone both experiments. At 9 d after end protocol only animals that had ovulated implanted a 7-d [experiment 1 (Exp. 1); n = 1,401 events from 1,045 cows, experiment 2 2); 1,147...
Cows with reduced estrous expression have compromised fertility. The aim of this study was to determine whether the administration GnRH at time artificial insemination (AI) would affect ovulation rates and fertility animals expressing behavior lesser intensity. were enrolled estrus from 3 farms (n = 2,607 events; farm A: 1,507, B: 429, C: 671) randomly assigned receive AI or not (control). intensity expression, monitored through leg-mounted activity monitors, determined using maximum during...
<h2>ABSTRACT</h2> The objectives of this retrospective observational study were to determine the associations anogenital distance (AGD) with (a) postpartum estrous activity, (b) diameter preovulatory follicle, (c) intensity expression, (d) postestrus ovulation, (e) corpus luteum (CL) size, and (f) concentrations progesterone at estrus on d 7 after estrus. Lactating Holstein cows (n = 178; 55 primiparous, 123 multiparous) enrolled into during first week. All continuously monitored by a...
Abstract. This study aimed to establish P4 and luteinizing hormone (LH) levels ovarian activity as approaches monitor the cyclicity of ewes under postpartum anestrus after male effect approach. Santa Inês females (n = 66) were evenly distributed into experimental groups where they brought contact with an intact during period 35 40 days (T1) 55 60 (T2). Ewes isolated from males for 30 before onset experiment. Estrus events detected in 93.30 % 100 (T2) females. Mean concentrations (η g mL−1)...
This study aimed to determine changes in rumen-reticular temperature (RRT) at estrus or ovulation and if these are associated with the intensity of estrous expression. Cows were equipped an automated activity monitor (AAM) a bolus thermometer. A total 190 episodes used where physical data was recorded using AAM determined via ultrasonography ovaries alert twice daily, for maximum 60 h. Estrous expression assessed duration which remained above threshold; both characteristics categorized...
The objective of this observational study was to evaluate the efficacy a neck-mounted automated activity monitor (AAM) at detecting early postpartum resumed ovarian cyclicity. A total 192 lactating cows (primiparous = 73 and multiparous 119) were enrolled in study. Cows continuously monitored by AAM (7 30 d milk; DIM). Calving classified as assisted (forced extraction calf) or unassisted (normal calving). Retained fetal membrane, metritis, hyperketonemia, clinical mastitis, milk production...