Efficacy of Intravaginal Progesterone Administration as an Additional Treatment on Two Types of Timed AI Protocols in a Commercial Herd of Holstein Heifers
| Autor: | Shunichi Kamimura, Tomonaga Narahashi, Masahito Ohkubo, Go Kitahara, Akihiro Iwakuma |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
medicine.medical_specialty
medicine.medical_treatment media_common.quotation_subject Ice calving Breeding chemistry.chemical_compound Animal science Japan Pregnancy medicine Animals Ovulation Insemination Artificial Progesterone Ultrasonography media_common Gynecology Analysis of Variance General Veterinary business.industry Artificial insemination Ovary Age Factors Administration Intravaginal Pregnancy rate medicine.anatomical_structure chemistry Estradiol benzoate Herd Cattle Female Estrus Synchronization business Corpus luteum |
| Zdroj: | Journal of Veterinary Medical Science. 70:243-249 |
| ISSN: | 1347-7439 0916-7250 |
| DOI: | 10.1292/jvms.70.243 |
| Popis: | Reproductive performance of two types of timed artificial insemination (TAI) protocols with or without intravaginal progesterone insert (CIDR) was investigated in a commercial herd of Holstein heifers. A total of seventy-four heifers with 14.4 months of age were allocated to two groups; Ovsynch (n=44) and estradiol benzoate (EB) used Heatsynch (EB-Heatsynch, n=30), and each group was additionally divided into two subgroups with CIDR insertion from day 0 to 7 (n=36) and without CIDR group (n=38). Blood was collected for progesterone (P4) analysis and ovarian finding was monitored with ultrasonography. Heifers in CIDR-treated group resulted in higher pregnancy rate as compared to No-CIDR-treated group (63.9% vs 21.1%, P |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|