geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Lack of relationship between spontaneous fluctuations of fsh luteinizing hormone and testosterone and semen output quality in young postpubertal bulls


, : Lack of relationship between spontaneous fluctuations of fsh luteinizing hormone and testosterone and semen output quality in young postpubertal bulls. Zuchthygiene (Berlin) 20(5): 222-228

The secretory patterns of FSH, LH and testosterone were investigated in eight young postpubertal bulls from frequent blood samplings repeated on two occasions. These bulls were classified according to their semen output, evaluated from 15 consecutive weekly ejaculations, as good (n = 5 bulls) or poor (n = 3 bulls) semen producers. A lack of significant difference between the FSH, LH and testosterone patterns of good and poor semen producers was observed in the present study. It was concluded that as long as the physiological basic processes of spermatogenesis are initiated, poor semen output is not associated with drastic changes in the gonadotropins (FSH, LH) or testosterone secretions.

US$29.90


Other references

Murata, M.; Ohnishi, J.; Kohyama, K.; Makinoda, S.; Fujimoto, S.; Takahashi, T., 1996: A role of plasma kallikrein present in the follicular fluid of human ovary. Zoological Science (Tokyo) 13(SUPPL ): 50

Nelson, W.O.; Haterius, H.O., 1930: An experimental study of ovariectomy and transplantation in the pregnant albino rat. Attempts were made to determine whether virgin and immature ovaries could sustain pregnancy in ovariectomized rats. The procedure was based upon (1) unilateral ovariectomy, (2) impregnation, (3) implantation, and (4) subsequent removal of the anim...

Schulte A.E.ch J.; Thiemig I.; Pfeifer G.; Entzian W., 1979: The influence of some inhalation anesthetics on the intra cranial pressure with special reference to nitrous oxide. The influence of inhalation anesthetics on intracranial pressure (ICP), arterial blood pressure and cerebral perfusion pressure (CPP) was studied on 12 unconscious patients with head injury having an initial ICP of about 20 mm Hg. Halothane, enflu...

Tsonev, P.; G"l"binov, G.; Kamburov, G., 1975: Relationship between milk production and incidence of subclinical mastitis in cows. (i) 255 Bulgarian Brown Cows with subclinical mastitis (established by a positive Bernburg mastitis test, a milk cell count of >500 000/ml and a positive bacteriological test) and (ii) 255 cows showing none of these signs, were selected from co...

Mizoguchi, A.; Takeuchi, T.; Himuro, H.; Okada, T.; Mizoguchi, E., 2016: Genetically engineered mouse models for studying inflammatory bowel disease. Inflammatory bowel disease (IBD) is a chronic intestinal inflammatory condition that is mediated by very complex mechanisms controlled by genetic, immune, and environmental factors. More than 74 kinds of genetically engineered mouse strains have b...

Tsuchiya, K.; Obayashi, K.; Watanuki, M.; Horie, M., 1996: Does adenosine A1 receptor modulate cardiac ATP-sensitive K channel by increasing subsarcolemmal ?. Circulation 94(8 SUPPL ): I353

Osswald, J.; Carvalho, A.P.; Claro, J.; Vasconcelos, V., 2008: Effects of cyanobacterial extracts containing anatoxin-a and of pure anatoxin-a on early developmental stages of carp. This study compares the effects of pure anatoxin-a and cyanobacterial extracts of an anatoxin-a producing strain on early stages of development of carp. Carp eggs were exposed from 2:30 h to 4 days post-fertilization to different ecologically rele...

Bălan, A.; Dinică, V.; Popa, R.; Beldescu, N., 1999: The prevalence of viral hepatitis markers in patients hospitalized in infectious disease wards with a diagnosis of acute viral hepatitis. According with Romanian public health surveillance system, the acute viral hepatitis is nominal reportable disease for what hospital admission is compulsory (Ord. MS 638/1978 and Ord. MS 386/1985); that why, for this condition controlling purpose,...

Howald, H., 1975: Blood doping. Schweizerische Zeitschrift für Sportmedizin 23(4): 201-203

Egan, J.A.; Filer, C.N., 2015: Tritiation and characterization of several suicide substrate enzyme inactivators. Methods are presented to tritiate the enzyme inhibitors pargyline and caracemide.