Roles of hCG in Advancing Follicular Growth to Ovulation after Concurrent Injections of PGF2α and GnRH in Postpubertal Holstein Heifers Bearing a CL
المؤلفون المشاركون
Johnson, Ricky
Cuadra, Evelin J.
Mason, Melissa
Jung, Yoonsung
Bennett, William A.
Njiti, Victor
المصدر
Veterinary Medicine International
العدد
المجلد 2010، العدد 2010 (31 ديسمبر/كانون الأول 2010)، ص ص. 1-7، 7ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2010-12-01
دولة النشر
مصر
عدد الصفحات
7
التخصصات الرئيسية
الملخص EN
A study was conducted to test the hypothesis that injecting Gonadotropin-releasing hormone (GnRH) concurrently with Prostaglandin F2 alpha (PGF2α) followed by an injection of human Chorionic Gonadotropin (hCG), would advance follicular growth to ovulation in Holstein heifers bearing a corpus luteum (CL).
After manual examination of the CL, group 1 (PGF; n=12) received an injection of PGF2α (25 mg, im).
Group 2 (PGF + GnRH; n=13) received an injection of GnRH (100 μg, im) immediately after an injection of PGF2α.
Group 3 (PGF + GnRH + hCG; n=12) received concurrent injections of PGF2α and GnRH followed with hCG (1500 IU, im) two days later.
Follicular size and day of ovulation were monitored by daily ultrasonographic examination from days 1 to 10.
Blood was collected on days-7, 0 (PGF2α administration), 2, and 7.
Progesterone was not different (P>.05) on days-7, 0, and 2 between the experimental groups.
However, it was higher (P<.005) in the PGF + GnRH + hCG group on day 7 compared to PGF + GnRH heifers, but not significantly higher than the PGF.
Additionally, heifers in the PGF + GnRH + hCG group ovulated earlier (P<.05) than heifers in the PGF + GnRH and the PGF group.
This data indicates that hCG advances follicular growth to ovulation in spite of high levels of progesterone when injected 48 h after concurrent treatments of GnRH and PGF2α on heifers bearing a CL.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Johnson, Ricky& Bennett, William A.& Cuadra, Evelin J.& Njiti, Victor& Jung, Yoonsung& Mason, Melissa. 2010. Roles of hCG in Advancing Follicular Growth to Ovulation after Concurrent Injections of PGF2α and GnRH in Postpubertal Holstein Heifers Bearing a CL. Veterinary Medicine International،Vol. 2010, no. 2010, pp.1-7.
https://search.emarefa.net/detail/BIM-468665
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Johnson, Ricky…[et al.]. Roles of hCG in Advancing Follicular Growth to Ovulation after Concurrent Injections of PGF2α and GnRH in Postpubertal Holstein Heifers Bearing a CL. Veterinary Medicine International No. 2010 (2010), pp.1-7.
https://search.emarefa.net/detail/BIM-468665
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Johnson, Ricky& Bennett, William A.& Cuadra, Evelin J.& Njiti, Victor& Jung, Yoonsung& Mason, Melissa. Roles of hCG in Advancing Follicular Growth to Ovulation after Concurrent Injections of PGF2α and GnRH in Postpubertal Holstein Heifers Bearing a CL. Veterinary Medicine International. 2010. Vol. 2010, no. 2010, pp.1-7.
https://search.emarefa.net/detail/BIM-468665
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-468665
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر