Intrafollicular Concentrations of Steroid Hormones and PGF2.ALPHA. in Relation to Follicular Development in the Mares during the Breeding Season
| Autor: | Masanori Koyago, Anna Yumiko Kojima, Tsutomu Tsukada, Kunitada Sato, Masaharu Moriyoshi, Yutaka Sawamukai |
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| Rok vydání: | 2008 |
| Předmět: |
Estrous cycle
endocrine system medicine.medical_specialty steroid hormones Equine PGF2α concentration medicine.medical_treatment media_common.quotation_subject Biology Note Follicular fluid follicular fluid Steroid Endocrinology mare Internal medicine Follicular phase medicine Seasonal breeder Androstenedione Ovulation Hormone media_common |
| Zdroj: | Journal of equine science |
| ISSN: | 1347-7501 1340-3516 |
| DOI: | 10.1294/jes.19.31 |
| Popis: | The concentrations of androstenedione, estradiol-17β, progesterone and PGF2α contained in the follicular fluid produced by the follicles in collected ovaries of mares that have had estrous phase during the breeding season were measured and analyzed the relation between the growth stage of follicles and the hormone levels in the follicular fluid. An ultrasonographic diagnostic instrument was used to measure the diameter of the follicles in order to categorize the follicles into three groups the following: 8 small follicles (from 1.0 to less than1.5 cm), 8 medium follicles (from 1.5 to less than 3.0 cm), and 8 large follicles (from 3.0 to 5.0 cm), respectively. The analysis of the follicular fluid in ovaries of estrous mares showed that the concentrations of androstenedione were significantly higher in the medium or large follicles than in the small follicles and the concentrations of estradiol-17β were significantly higher in larger follicles than in the small or medium follicles (P |
| Databáze: | OpenAIRE |
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