Ovulation Time in Superovulated Ewes during the Non-Breeding Season
| Autor: | Mayuko Minato, Tomoe Ogiso, Daisuke Ishikawa, Midori Okada, Naohisa Ishida, Yutaka Fukui, Kazuhide Sebata, Ryoko Itagaki |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Estrous cycle
medicine.medical_specialty media_common.quotation_subject Biology Vaginal sponges Follicle-stimulating hormone Animal science Endocrinology Internal medicine Seasonal breeder medicine Animal Science and Zoology Intramuscular injection Equine chorionic gonadotropin Ovulation media_common |
| Zdroj: | Journal of Reproduction and Development. 44:267-272 |
| ISSN: | 1348-4400 0916-8818 |
| DOI: | 10.1262/jrd.44.267 |
| Popis: | The present study was undertaken to evaluate ovulation time after superovulation treatment in ewes during the non-breeding season. Ewes (n=17) were treated with vaginal sponges impregnated with fluorogesterone acetate (FGA sponge) for 12 days. To the superovulation group (n=9), an intramuscular injection of 20 mg porcine follicle stimulating hormone (pFSH) was given at 48 h before sponge removal, and 500 IU equine chorionic gonadotropin (eCG) was given 24 h later after the pFSH injection. Ewes in the control group (n=8), were given 500 IU eCG alone 24 h before sponge removal. The time of ovulation was assessed by repeated observation of the ovaries in both groups of ewes using a laparoscope. Observations were commenced 24 h after sponge removal and were conducted every 6 h for a total of 60 h. The intervals between sponge removal and the onset of estrus, and ovulations were shorter in the superovulation group than the control group (P |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|