scholarly journals Factors affecting feed intake, body weight, testicular size, and testosterone, follicle stimulating hormone (FSH) and luteinizing hormone (LH) serum concentrations in peri-pubertal male camels

2015 ◽  
Vol 10 (14) ◽  
pp. 1709-1713 ◽  
Author(s):  
M Y Al Saiady ◽  
H H Mogawer ◽  
S E Al Mutairi ◽  
M Bengoumi ◽  
A Musaad ◽  
...  
Keyword(s):  
Body Weight ◽  
Luteinizing Hormone ◽  
Feed Intake ◽  
Follicle Stimulating Hormone ◽  
Serum Concentrations ◽  
Factors Affecting ◽  
Testicular Size ◽  
Stimulating Hormone

Pharmacological doses of calcitonin reduce sex hormone levels in rat plasma

1988 ◽  
Vol 119 (4) ◽  
pp. 525-528 ◽  
Author(s):  
Talaat S. Mahrous ◽  
Atif M. Nakhla
Keyword(s):  
Body Weight ◽  
Luteinizing Hormone ◽  
Salmon Calcitonin ◽  
Follicle Stimulating Hormone ◽  
Plasma Concentrations ◽  
Rat Plasma ◽  
Sex Hormone ◽  
Time Dependent ◽  
Hormone Levels ◽  
Stimulating Hormone

Abstract. Administration of a pharmacological dose of salmon calcitonin into rats (10 MRC U/kg body weight) significantly reduced plasma concentrations of testosterone and estradiol in a time-dependent fashion. This apparently was mediated by a diminished secretion of luteinizing hormone and follicle-stimulating hormone, the levels of which were also significantly reduced after 1 h of calcitonin administration.

Luteinizing hormone, follicle-stimulating hormone, testosterone and dihydrotestosterone during testicular descent in the pig fetus

1996 ◽  
Vol 8 (7) ◽  
pp. 1115 ◽  
Author(s):  
JH Visser ◽  
CF Heyns
Keyword(s):  
Luteinizing Hormone ◽  
Body Mass ◽  
Follicle Stimulating Hormone ◽  
Linear Increase ◽  
Testicular Descent ◽  
Serum Concentrations ◽  
Male And Female ◽  
Androgen Synthesis ◽  
Significant Difference ◽  
Stimulating Hormone

To investigate the relationship between gonadotrophins, androgens and testicular descent in the pig fetus, serum concentrations of luteinizing hormone (LH) and follicle-stimulating hormone (FSH), and serum concentrations and testicular content of testosterone (T) and 5 alpha-dihydrotestosterone (DHT) were determined by radioimmunoassay in 95 fetuses (48 males, 47 females) between Day 60 and Day 90 post coitum (p.c.). The testes were descended in 0% of fetuses at Day 60, 8% of fetuses at Day 70, 40% of fetuses at Day 80 and 87% of fetuses at Day 90 p.c. There was a significant increase in mean serum concentrations of LH in both male and female fetuses from Day 60 to Day 90, with a significant difference in mean serum concentrations of LH between male fetuses with a body mass < 350 g (4% of testes descended) and those with a body mass > 450 g (87% of testes descended), but not between male and female fetuses < 350 g or > 450 g in body mass. There was no significant difference in mean serum concentrations of FSH between male and female fetuses. Mean serum concentrations of T were significantly higher in male fetuses at Day 60 than in those at Days 70-90, with no significant difference in serum concentrations of DHT from Day 60 to Day 90 p.c. Testicular content of T and DHT showed a non-linear increase from Day 60 to Day 90 p.c. Although the serum concentration of T is elevated before, and decreased during, the period of descent, the testicular content of T and DHT increases during the period of descent, indicating that serum concentrations of LH and FSH may have an indirect effect on descent by stimulating testicular androgen synthesis.

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