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Showing 1 to 20 of 21 for “"estrus detection"”.
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Towards an electronic system for estrus detection in swine
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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Comparison of three estrus detection systems during summer heat stress in a large commercial dairy herd
… of the study was to compare three systems for detection of estrus and combinations of these systems on a large commercial dairy (1000 lactating cows) during stress of summer heat. At 37 to 45 days in milk (DIM), 266 cows were fitted with a HeatWatch (HW) device (HeatWatch; DDx Inc., Boulder, …
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Detecting estrus in sows using a robotic imaging system and neural networks
… as low breeding efficiency and high labor cost. Estrus detection is crucial to reproductive management of sows. Due to the longevity of the sperm and eggs, achieving timely and accurate estrus detection can lead to higher conception rates, larger litter size, and lower non-productive days. …
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Factors Influencing the Reproductive Efficiency of Dairy Herds in the Dominican Republic
… Increase in the number of employees involved in estrus detection resulted in higher days to first service. The Santo Domingo region had lower days to first service possibly due to widespread reproductive hormone use within the region. The percentage of Holsteins within the herd was associated …
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Evaluation of systematic breeding programs in lactating dairy cows
Observing cows in estrus and inseminating them at the optimal time are necessary steps for effective reproductive management of a dairy herd. However, increasing herd sizes can lead to reproductive inefficiency resulting in decreased profits on dairy herds. Synchronization of estrus, through …
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Investigation of skin temperature differentials in relation to estrus and ovulation in sows using a thermal infrared scanning technique
Accurate estrus detection is an essential component of a successful artificial insemination program in modern swine operations. It is necessary to establish efficacious means of estrus detection and to optimize reproductive performance in the herd. Measurement of physical and physiological traits …
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Optimal time of insemination in dairy cattle identified in estrus by HeatWatch
Estrus detection programs practiced on most U.S. dairy farms are not intense enough to provide the information needed to accurately time insemination, thus preventing AI from obtaining its full conception rate potential. Herds (n = 17) participated in a trial designed to evaluate percent pregnant …
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Feeding strategies to enhance gilt reproduction and subsequent longevity and productivity in the breeding herd
… or RS (2.72 kg/d) bases. In the first study, estrus detection began at 160 d of age. In experiment 2, gilts assigned to receive gonadotropins were treated at 170 d of age, with estrus detection beginning the next d. Gilts fed on the RS basis were observed to have improved feed conversion …
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Evaluation of the 7 and 7 synch protocol for control of the estrous cycle among beef cows prior to fixed-time artificial insemination with sex-sorted or conventional semen
… and PG coincident with CIDR removal on Day -3. Estrus detection aids were applied to all cows. Cows received FTAI 66 h after CIDR removal with conventional (20 x 106 cells per unit) or sex-sorted (4 x 106 cells per unit) semen. Estrus expression was affected by protocol (P = 0.01) by protocol x …
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Effects of Feeding Supplemental Eicosapentanoic Acid and Docosahexanoic Acid to Beef Females on Reproductive Responses and Free Fatty Acids
… fish meal (FM) or no fish meal (C) supplements. Estrus was synchronized and ovulation induced on d 37. Ovarian follicular growth and diameter were determined by ultrasound on d 35 and d 37. Serum progesterone (P4) profiles were analyzed on d 37 through d 52. On d 52 cows were cannulated, primed …
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The Interaction of Sire Fertility and Timing of AI in a Synchronization Protocol
… CIDR inserts to allow for resynchronization of estrus in cows that did not conceive or maintain the conceptus at FTAI. Lactating Holstein cows (n = 1,457) from two well-managed dairy herds located in the piedmont region of North Carolina were utilized for 12 mo. First artificial insemination …
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Detection of Progesterone in Cow’s Milk for the Prediction of Reproductive Performance
… the profitability of dairy farms. The correct detection of estrus plays an important role in the success of insemination, conception and further reproductive outcomes. Conventional methods to detect estrus are often laborious or erroneous. Progesterone (P4) is one of the hormones that regulates …
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The effect of interval between inseminations and semen handling on in-vivo and in-vitro fertility of frozen-thawed boar sperm
… that ovulated by 36 and 48 h after the onset of estrus had greater pregnancy rates (P < 0.001) than those that ovulated by 24 and 60 h after the onset of estrus, but, estrus to ovulation interval had no effect on litter size or embryo survival (P > 0.10). Interval between inseminations had no …
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Cryopreservation of microencapsulated bovine spermatozoa
… tract, thus alleviating the need for estrus detection. The objective of Trial 1 was to determine in vitro sperm release times for three microcapsule membranes. Semen was collected from four bulls, pooled, extended in 20% egg yolk TEST to a concentration of 80 = 10⁶ cells/ml, and …
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Impacts of microenvironment variation during breeding and gestation on the reproduction and well-being of mature gilts
… individually in crates. In eight replicates, estrus was synchronized in mature gilts (n = 198) and after last feeding of Matrix were randomly assigned to a room temperature of 15 °C (COLD), 21°C (NEUTRAL) or 30 °C (HOT), and a light intensity of 11 (DIM) or 433 (BRIGHT) lx. Estrus detection …
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Effect of the timing of OvuGel administration on reproductive performance in gilts sycnhronized for estrus
… time of OvuGel® administration on the timing of estrus and ovulation and fertility results in gilts synchronized for estrus by administering Matrix® for 14 d. Insemination must occur near the time of ovulation to achieve high fertility results, however, there is no practical method available to …
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Effect of delaying time of AI based on Estrotect patch status on pregnancy rates of beef heifers and nursing beef cows
Four studies were conducted to evaluate the efficacy of a delayed timed AI (TAI) protocol. The objective was to evaluate the use of Estrotect patch status to determine optimum TAI implementation. Experiment 1 was conducted with, 997 cows across 6 locations were administered a 7-d CO-Synch + …
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Evaluation of the Hypothalamic Kisspeptin System Throughout the Estrous Cycle and During the Attainment of Puberty in Gilts
… mg of altrenogest daily for 15 d to synchronize estrus. Following estrus synchronization, estrus detection was performed by exposing gilts to a mature boar and the first day gilts stood immobile was denoted d 1 of the estrous cycle. Blood samples were collected via jugular venipuncture on d 1, 4, …
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The Effects of a GnRH Antagonist, Cetrorelix, on Ovarian Function in Cattle
… and effective during different stages of the estrus cycle. Two studies were conducted to determine the effects of a GnRH antagonist, cetrorelix, on the follicular dynamics in cattle during different stages of follicular growth and in different endocrine milieus. The specific objective was to …
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Monitoring and improving reproductive performance of crossbred dairy cattle in Tigray Region, Ethiopia
… and calve late, and cows have long postpartum estrus and calving interval. Anestrus, repeat-breeding, dystocia, retained fetal membranes (RFM), endometritis and abortion as the major reproductive problems in dairy cattle in the study area. Serum, milk, saliva and urine P4 and serum estradiol …
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