EurekaMag.com logo
+ Translate

Regulation of gonadotropin secretion in rams from birth to sexual maturity part 2 response of the pituitary testicular axis to luteinizing hormone releasing hormone infusion


, : Regulation of gonadotropin secretion in rams from birth to sexual maturity part 2 response of the pituitary testicular axis to luteinizing hormone releasing hormone infusion. Journal of Reproduction and Fertility 46(1): 7-11

The response of the pituitary-testicular axis to LH-RH [luteinizing hormone-releasing hormone] infusion was investigated in rams from birth to sexual maturity. During early postnatal life ram lambs were responsive to LH-RH stimulation and heightened pituitary sensitivity was observed in rams aged 2-3 mo. A change in sensitivity of the pituitary testicular axis may occur at this time and perhaps represents the time of initiation of the pubertal process.

(PDF 0-2 workdays service)

Accession: 006288244

Submit PDF Full Text: Here


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Related references

Lee, V.; Cumming, I.; De-Kretser, D.; Findlay, J.; Hudson, B.K.ogh, E., 1976: Regulation of gonadotropin secretion in rams from birth to sexual maturity. II. Response of the pituitary-testicular axis to LH-RH. Journal of reproduction and fertility: 46 (1) 7-11

Lee V.W.K.; Cumming I.A.; D.K.etser D.M.; Findlay J.K.; Hudson B.; Keogh E.J., 1976: Regulation of gonadotropin secretion in rams from birth to sexual maturity part 1 plasma luteinizing hormone follicle stimulating hormone and testosterone levels. Journal of Reproduction & Fertility 46(1): 1-6

Lee, V.W.; Cumming, I.A.; de Kretser, D.M.; Findlay, J.K.; Hudson, B.; Keogh, E.J., 1976: Regulation of gonadotrophin secretion in rams from birth to sexual maturity. II. Response of the pituitary-testicular axis to LH-RH infusion. During early postnatal life, ram lambs were responsive to LHRH stimulation, and heightened pituitary sensitivity was observed in rams aged 2-3 mth. It is suggested that a change in sensitivity of the pituitary-testicular axis occurs at this time a...

Lee, V.W.K.; Cumming, I.A.; Kretser, D.M. de; Findlay, J.K.; Hudson, B.; Keogh, E.J., 1976: Regulation of gonadotrophin secretion in rams from birth to sexual maturity. I. Plasma LH, FSH and testosterone levels. II. Response of the pituitary-testicular axis to LH-RH infusion. Plasma LH, FSH and testosterone concentrations were measured by radioimmunoassay in male crossbred Merino/Corriedale sheep from birth to 45 weeks of age. FSH levels were between 11 and 22 ng/ml at birth, increased to peak levels (mean value of 47...

Mann D.R.; Gould K.G.; Collins D.C., 1984: Influence of continuous gonadotropin releasing hormone agonist treatment on luteinizing hormone and testosterone secretion the response to gonadotropin releasing hormone and the testicular response to human chorionic gonadotropin in male rhesus monkeys. Five adult male rhesus monkeys were continuously infused for 56 days with 25 .mu.g/day of GnRH [gonadotropin-releasing hormone] agonist (Wy-40972 [[6-D-Trp,7-N-MeLeu,1-des-Gly,9-O-Pro]LHRH ethylamide]; Ag) using an implanted osmotic pump. Bioassay...

Roemmler, A.; Baumgarten, S.; Schneller, E.; Schwartz, U.; Hammerstein, J., 1978: Short term regulation of luteinizing hormone and follicle stimulating hormone secretion in cyclic women part 2 initial augmentation and subsequent diminution of gonadotropin secretion in response to 6 repeated luteinizing hormone releasing hormone injections at short intervals. The effects of 6 consecutive LH-RH [luteinizing hormone releasing hormone] injections (25 .mu.g i.v. each) at 90 min intervals on serum gonadotropin and serum ovarian steroid levels were investigated in 13 cyclic women in the follicular, midcycle...

Schneider H.P.G., 1976: Human pituitary gonadotropin index part 2 luteinizing hormone releasing hormone test and clomiphene response before and after luteinizing hormone releasing hormone stimulation. Clinical Endocrinology: 25-36

Schally A.V.; Kastin A.J., 1970: The role of sex steroids hypothalamic luteinizing hormone releasing hormone and follicle stimulating hormone releasing hormone in the regulation of gonadotropin secretion from the anterior pituitary gland. Briggs, M H (Edited By) Advances in Steroid Biochemistry And Pharmacology, Vol 2 Ix + 479p Illus Academic Press: New York, N Y , U S A ; London, England 42-69

Wu, F.C.; Irby, D.C.; Clarke, I.J.; Cummins, J.T.; de Kretser, D.M., 1987: Effects of gonadotropin-releasing hormone pulse-frequency modulation on luteinizing hormone, follicle-stimulating hormone and testosterone secretion in hypothalamo/pituitary-disconnected rams. Ten-minute blood sampling in 16 normal rams prior to hypothalamic/pituitary-disconnection (HPD) showed endogenous LH pulses occurring every 2.3 h, with a mean pulse amplitude of 1.11+or-0.06 ng/ml. Mean testosterone and FSH concentrations were 3.0...

Roemmler, A., 1978: Short term regulation of luteinizing hormone and follicle stimulating hormone secretion in cyclic women part 1 altered pituitary response to a 2nd of 2 luteinizing hormone releasing hormone injections at short intervals. The effects of 2 i.v. 25 .mu.g LH-RH [luteinizing hormone releasing hormone] injections (180 tests) at different intervals (30 min-24 h) on radioimmunoassayable serum LH [luteinizing hormone] and FSH [follicle stimulating hormone] levels were inve...