دورية أكاديمية
Efficacy of an automated technology at detecting early postpartum estrus events: Can we detect resumption of cyclicity?
| العنوان: | Efficacy of an automated technology at detecting early postpartum estrus events: Can we detect resumption of cyclicity? |
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| المؤلفون: | Borchardt S; Clinic of Animal Reproduction, Freie Universität Berlin, 14163, Berlin, Germany., Burnett TA; University of Guelph, Ridgetown Campus, Ridgetown, ON, Canada N0P 2C0., Heuwieser W; Clinic of Animal Reproduction, Freie Universität Berlin, 14163, Berlin, Germany., Plenio JL; Institute for Veterinary Epidemiology and Biostatistics, Freie Universität Berlin, 14163, Berlin, Germany., Conceição RS; Faculty of Land and Food Systems, University of British Columbia, Canada V6T 1Z4., Cerri RLA; Faculty of Land and Food Systems, University of British Columbia, Canada V6T 1Z4., Madureira AML; University of Guelph, Ridgetown Campus, Ridgetown, ON, Canada N0P 2C0. |
| المصدر: | JDS communications [JDS Commun] 2023 Nov 17; Vol. 5 (3), pp. 225-229. Date of Electronic Publication: 2023 Nov 17 (Print Publication: 2024). |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Elsevier Inc. and FASS Inc. on behalf of the American Dairy Science Association Country of Publication: United States NLM ID: 9918300983806676 Publication Model: eCollection Cited Medium: Internet ISSN: 2666-9102 (Electronic) Linking ISSN: 26669102 NLM ISO Abbreviation: JDS Commun Subsets: PubMed not MEDLINE |
| أسماء مطبوعة: | Original Publication: [New York] : Elsevier Inc. and FASS Inc. on behalf of the American Dairy Science Association, [2020]- |
| مستخلص: | The objective of this observational study was to evaluate the efficacy of a neck-mounted automated activity monitor (AAM) at detecting early postpartum resumed ovarian cyclicity. A total of 192 lactating cows (primiparous = 73 and multiparous = 119) were enrolled in this study. Cows were continuously monitored by a neck-mounted AAM early postpartum (7 to 30 d in milk; DIM). Calving was classified as assisted (forced extraction of a calf) or unassisted (normal calving). Retained fetal membrane, metritis, hyperketonemia, clinical mastitis, and milk production were recorded. Cows were classified as healthy (i.e., no disease events) or sick (i.e., any disease event). Estrus events were alerted by the AAM using a proprietary algorithm set by the AAM company. Blood samples, from the coccygeal vein, were collected at 15, 18, 21, 24, 28, and 30 DIM for progesterone (P4) analysis. Resumption of cyclicity was considered when P4 concentration was ≥1 ng/mL on any collection day. Cows were considered anovular when P4 concentration was <1 ng/mL on all collection days. Cows were classified as true positive: P4 ≥ 1 ng/mL and at least one estrus alert; false positive: P4 < 1 ng/mL and at least one estrus alert; true negative: P4 < 1 ng/mL and no estrus alerts; and false negative: P4 ≥ 1 ng/mL and no estrus alerts. Statistical analyses were performed by frequency distribution and mixed effects logistic regression procedures on SAS (SAS Institute Inc.). The specificity, sensitivity, accuracy, and positive predictive value of the sensor to detect cows that had resumed cyclicity were 84.0%, 34.1%, 52.1%, and 79.2%, respectively. Out of the 192 cows, 35.9% (69/192) were anovulatory and 37.5% (72/192) had no estrus events between 7 to 30 DIM. Healthy cows were more likely to resume cyclicity in early lactation compared with cows that were sick (78.3 ± 1.9 vs. 32.8 ± 3.1%, respectively) independent of parity. In conclusion, the sensor had a high specificity for detecting anovular cows, but it had lower sensitivity, and thus was not effective at detecting cyclic cows, perhaps due to silent ovulation early postpartum. (© 2023.) |
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| تواريخ الأحداث: | Date Created: 20240422 Latest Revision: 20240423 |
| رمز التحديث: | 20240423 |
| مُعرف محوري في PubMed: | PMC11026962 |
| DOI: | 10.3168/jdsc.2023-0463 |
| PMID: | 38646585 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 2666-9102 |
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| DOI: | 10.3168/jdsc.2023-0463 |