Effects of the FSH treatment on ovarian folli-cular cyst and ovulation failure in light breedmares

Tsukada, Tsutomu; Ikemoto, Yasuo; Kawaguchi, Mamoru; Imamichi, Tomonori

doi:10.1262/jrd1955.21.7

The Japanese journal of animal reproduction

1975

DOI: 10.1262/jrd1955.21.7

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Effects of the FSH treatment on ovarian folli-cular cyst and ovulation failure in light breedmares

Tsutomu Tsukada

Yasuo Ikemoto

Mamoru Kawaguchi

et al.

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2008

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“…Such a result probably suggests that there were no follicles immediately before ovulation in any of the test ovaries in mares. In mature follicles, it has been considered that gonadotropic hormones act as survival factors whereas progesterone and androstenedione suppress follicular growth [12]. The present study showed that the estradiol-17β levels in the follicular fluid of large follicles were markedly high, indicating that the granulosa cells were progressively proliferating while their apoptosis was suppressed.…”

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confidence: 46%

Intrafollicular Concentrations of Steroid Hormones and PGF2.ALPHA. in Relation to Follicular Development in the Mares during the Breeding Season

Tsukada¹,

Kojima

Sato

et al. 2008

JES

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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<0.05). The concentrations of progesterone and PGF2α, on the other hand, did not significantly vary regardless of follicluar size. In the follicles within the mare ovaries that have had estrous stage, the concentrations of the hormones related the ovulation, namely androstenedione and estradiol-17β, were higher with larger follicles.

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confidence: 46%

Intrafollicular Concentrations of Steroid Hormones and PGF2.ALPHA. in Relation to Follicular Development in the Mares during the Breeding Season

Tsukada¹,

Kojima

Sato

et al. 2008

JES

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“…[ 1 ] and Tsukada, et al . [ 18 , 19 ] reported successful induction of follicular maturation and ovulation in mares following administration of equine pituitary extract, and PMSG, hCG and porcine FSH. The effect of hCG administration on inducing ovulation in mares was also reported by Gastal, et al .…”

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confidence: 99%

Treatment with a High Dose Combination of PMSG/hCG Preparation of Mares Clinically Diagnosed with Ovarian Quiescence during the Breeding Season (Investigation from 1975 to 2000)

Tsukada¹,

Sato

Moriyoshi

et al. 2008

JES

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A total of 88 thoroughbred mares were diagnosed with clinical ovarian quiescence and subjected to four treatment regimens. Using PMSG, hCG or combinations of both. A high dose combination of 5,000IU PMSG with 5,000IU hCG showed significantly higher rates of marked estrus and ovulation induction (P<0.01) as well as conception rates (P<0.05). In the present study, the administration of a high-dose combination of PMSG with hCG was shown to be an effective treatment of ovarian quiescence in light mares.

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Effects of the FSH treatment on ovarian folli-cular cyst and ovulation failure in light breedmares

Cited by 2 publications

References 0 publications

Intrafollicular Concentrations of Steroid Hormones and PGF2.ALPHA. in Relation to Follicular Development in the Mares during the Breeding Season

Intrafollicular Concentrations of Steroid Hormones and PGF2.ALPHA. in Relation to Follicular Development in the Mares during the Breeding Season

Treatment with a High Dose Combination of PMSG/hCG Preparation of Mares Clinically Diagnosed with Ovarian Quiescence during the Breeding Season (Investigation from 1975 to 2000)

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