Ovulation rate in ewes synchronized with Syncro-Mate-B (SMB) and follicle stimulating hormone
| Autor: | Dale A. Redmer, K.C. Kraft, Chainarong Navanukraw, Anna T. Grazul-Bilska, James D Kirsch, A.S. Erickson, Jerzy J. Bilski, Lawrence P. Reynolds, T.K. Stenbak, H.R. Berginski, M.J. Toutges |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
endocrine system
medicine.medical_specialty SYNCRO-MATE-B medicine.medical_treatment media_common.quotation_subject Biology Insemination Embryo transfer Andrology Follicle-stimulating hormone Endocrinology Food Animals Laparotomy Internal medicine Follicular phase medicine Animal Science and Zoology Ovulation media_common |
| Zdroj: | Small Ruminant Research. 48:1-8 |
| ISSN: | 0921-4488 |
| Popis: | To achieve successful embryo transfer programs, ewes must be hormonally stimulated to induce multiple follicular development. Knowing the times of ovulation in these stimulated animals is critical for accurate timing of insemination. To determine the timing of ovulation in ewes treated with Syncro-Mate-B (SMB) and FSH, ewes ( n =13) were implanted with SMB for 14 days and were treated with FSH twice daily for 4 days, starting on day 11 after SMB implantation. Ewes underwent laparoscopy at 36, 48, and 60 h after SMB removal (day 0) to count corpora hemorrhagica (CH), followed by laparotomy on day 8 to count corpora lutea (CL). Blood samples were taken every 6 h to record plasma LH, estradiol-17β, and progesterone concentrations on days 1–3, and one sample was collected before laparotomy on day 8. Ovulation rates (number of CH expressed as a percentage of the total number of CL) increased ( P P P P P P |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect