Academic Journal
Ultrasonographic evaluation of endometrial thickness near timed AI as a predictor of fertility in high-producing dairy cows
| العنوان: | Ultrasonographic evaluation of endometrial thickness near timed AI as a predictor of fertility in high-producing dairy cows |
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| المؤلفون: | Souza, Alexandre H, Silva, Eduardo P.B., Cunha, Arcelina Pacheco, Ayres, Henderson, Brusveen, D. J., Guenther, Jerry N., Wiltbank, Milo Charles |
| المساهمون: | Uludağ Üniversitesi/Veterinerlik Fakültesi/Veteriner Doğum ve Jinekoloji Anabilim Dalı., Gümen, Ahmet, AAH-1406-2021, 6602393069 |
| بيانات النشر: | Elsevier |
| سنة النشر: | 2011 |
| المجموعة: | Açık Erişim@BUU (Bursa Uludağ Üniversitesi) |
| مصطلحات موضوعية: | Reproductive biology, Veterinary sciences, Endometrial thickness, Ultrasound, Ovsynch, Pregnancy rates, Dairy cattle, In-vitro fertilization, Bovine estrous-cycle, Uterine growth, Estradiol-17-beta, Implantation, Heifersuterus, Proliferation, Bos, Animals, Cattle, Endometrium, Estradiol, Female, Fertility, Insemination, artificial, Pregnancy, Pregnancy Rate, Progesterone, Artificial Insemination, Estrus, Estrus Synchronization, Animal |
| الوصف: | The objectives were to evaluate changes in endometrial thickness (ET) near the time of a synchronized ovulation and to assess the relationship of ET and fertility in lactating Holstein cows, with or without estrogen supplementation near timed ovulation. In Experiment 1, eight cows were examined with transrectal ultrasonography, once daily for 5 d, starting concurrent with PGF(2 alpha) (PGF) treatment during an Ovsynch protocol (GnRH - 7d - PGF - 72h - GnRH). The ET increased rapidly after PGF (from similar to 7 to similar to 9.5 mm), remained > 9 mm for the next 2 d, then decreased to similar to 8 and 7.4 mm, 1 and 2 d, respectively, after the second GnRH. In Experiment 2,642 cows (total of 758 breedings) were subjected to an Ovsynch protocol (GnRH - 7d - PGF - 56h - GnRH - 16h - timed AI); cows received either no further treatment (Ovsynch) or 1 mg of estradiol-17 beta im 8 h before the second GnRH (Ovsynch + E2). For both uterine horns, ET was measured (similar to 2 cm from the internal uterine body bifurcation) before E2 treatment (48 h after PGF). In cows with ET <= 8 mm vs > 8 mm, rates of ovulation were 86.0% (n = 136) vs 98.1% (n = 472; P < 0.01), respectively, and percentage pregnant per AT (P/AI) were 26.7% (n = 146) vs 42.7% (n = 524; P < 0.01). Treatment with E2 increased P/AI in cows with lower ET (Ovsynch + E2 = 37.0% vs Ovsynch = 23.3%; P = 0.07), but did not significantly improve P/AI in cows with ET > 8 mm (Ovsynch + E2 = 43.4% vs Ovsynch = 42.1%). In conclusion, a single ultrasonographic evaluation of ET in Holstein cows 48 h after PGF treatment in an Ovsynch program was a good predictor of ovulation failure and pregnancy success. Perhaps poor fertility in cows with reduced ET was low peripheral E2 concentrations near AI, poor P4 priming, or luteolysis failure during timed AI procedures. ; United States Department of Agriculture (USDA) (2001-52101-11252) ; Wisconsin State Experiment Station |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0093-691X 1879-3231 |
| Relation: | Makale - Uluslararası Hakemli Dergi; Therigonology; Yurt dışı; Sanayi; Souza, A. H. vd. (2011). "Ultrasonographic evaluation of endometrial thickness near timed AI as a predictor of fertility in high-producing dairy cows". Theriogenology, 75(4), 722-733.; https://doi.org/10.1016/j.theriogenology.2010.10.013; https://pubmed.ncbi.nlm.nih.gov/21196031/; http://hdl.handle.net/11452/22753; 000287629800016; 2-s2.0-79959512977; 722; 733; 75 |
| DOI: | 10.1016/j.theriogenology.2010.10.013 |
| الاتاحة: | http://hdl.handle.net/11452/22753 https://doi.org/10.1016/j.theriogenology.2010.10.013 https://pubmed.ncbi.nlm.nih.gov/21196031/ |
| Rights: | info:eu-repo/semantics/closedAccess |
| رقم الانضمام: | edsbas.B2FECA41 |
| قاعدة البيانات: | BASE |
| تدمد: | 0093691X 18793231 |
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| DOI: | 10.1016/j.theriogenology.2010.10.013 |