ESTROGEN-INDUCED CHANGES IN SERUM LUTEINIZING HORMONE LEVELS IN OVARIECTOMIZED EWES
نویسندگان
چکیده
منابع مشابه
Changes in prolactin levels caused by luteinizing hormone releasing hormone.
The acute effects of luteinizing hormone releasing hormone (LHRH) on the release of prolactin (PRL) were investigated in 12 normal cycling women and 42 women with various menstrual disorders. LHRH (100 micrograms) was bolusly injected intramuscularly and PRL levels were measured immediately before the injection and at 30 minutes and 60 minutes after the injection. LHRH elicited an increase of m...
متن کاملDifferential regulation of gonadotropin synthesis and release in ovariectomized ewes after treatment with a luteinizing hormone-releasing hormone antagonist.
Our working hypothesis was that synthesis and release of LH, but not FSH, were solely dependent on LHRH. Twenty ovariectomized (OVX) ewes were randomly assigned to one of five treatments (n = 4 per group). Ewes were administered a low (10 micrograms/kg) or high (100 micrograms/kg) dose of LHRH antagonist (LHRH-Ant) at 24-h intervals for 3 or 6 days. Control ewes received vehicle (5% mannitol) a...
متن کاملEffects of time after ovariectomy, season and oestradiol on luteinizing hormone and follicle-stimulating hormone secretion in ovariectomized ewes.
During the breeding season, five groups of three ewes were implanted at ovariectomy with 0.36, 0.5, 1.0 and 6.0 cm oestradiol implants or implants containing no steroid. Eleven days after receiving implants, blood samples were taken every 10 min for 6 h; implants were then removed. Treatments were repeated three times during each of two consecutive breeding seasons and four times during the int...
متن کاملeffect of induced hypothyroidism by propiltiouracil (ptu) on serum levels of testosterone, luteinizing hormone, follicle stimulating hormone in adult rat
introduction: thyroid hormone is important for the growth, development and metabolism of the body. a new amount of data show that thyroid hormone influences on pituitary-testis axis. so in this study we investigated the effects of hypothyroidism induction by propiltiouracil (ptu) on serum levels of thyroid hormone, testosterone hormone, luteinizing hormone, follicle stimulating hormone, body an...
متن کاملHormone levels in plasma of ewes induced into lactation.
A short-term treatment with estradiol-17 beta and progesterone induced mammary gland growth and lactogenesis in non-pregnant ewes. These events normally occur during the second half of pregnancy. In order to compare the hormonal environment during the treatment to that during pregnancy, the concentrations of total estrogens (TE), progesterone (P4), glucocorticoids (G) and prolactin (Prl) in the...
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ژورنال
عنوان ژورنال: Canadian Journal of Animal Science
سال: 1973
ISSN: 0008-3984,1918-1825
DOI: 10.4141/cjas73-064