Probability of incubation by male Japanese Barn Swallows increases with plasma testosterone level

Ibis ◽  
2020 ◽  
Vol 162 (4) ◽  
pp. 1339-1344
Author(s):  
Masaru Hasegawa ◽  
Emi Arai ◽  
Masahiko Nakamura
Keyword(s):  
Testosterone Level ◽  
Plasma Testosterone ◽  
Plasma Testosterone Level ◽  
Barn Swallows

Infantile acne associated with a high plasma testosterone level in a 21-month-old boy

1995 ◽  
Vol 33 (4) ◽  
pp. 676-678 ◽  
Author(s):  
Nobuko Tabata ◽  
Tadashi Terui ◽  
Mariko Watanabe ◽  
Hachiro Tagami
Keyword(s):  
Testosterone Level ◽  
High Plasma ◽  
Plasma Testosterone ◽  
Plasma Testosterone Level

THE EFFECT OF CYPROTERONE ACETATE ON THE PLASMA GONADOTROPHIN RESPONSE TO GONADOTROPHIN RELEASING HORMONE

1976 ◽  
Vol 81 (3) ◽  
pp. 680-684 ◽  
Author(s):  
Richard A. Donald ◽  
Eric A. Espiner ◽  
R. John Cowles ◽  
Joy E. Fazackerley
Keyword(s):  
Testosterone Level ◽  
Cyproterone Acetate ◽  
Luteinising Hormone ◽  
Follicle Stimulating Hormone ◽  
Plasma Testosterone ◽  
Plasma Testosterone Level ◽  
Releasing Hormone ◽  
Lh Release ◽  
Gonadotrophin Releasing Hormone ◽  
Male Patients

ABSTRACT Cyproterone acetate (100–150 mg daily) was administered to 8 male patients with excessive libido. Within 3 months a significant fall (P < 0.02) in plasma testosterone was demonstrated. The plasma luteinising hormone (LH) and follicle stimulating hormone (FSH) responses to gonadotrophin releasing hormone (LH/FSH-RH) were also significantly impaired (P < 0.05). A direct correlation between the resting plasma testosterone level and the LH response to LH/FSH-RH was demonstrated (r = 0.743). It is concluded that the fall in plasma testosterone levels in patients receiving cyproterone acetate may be attributed to suppression of LH release, rather than an antiandrogen effect on the testis or hypothalamus.

scholarly journals The Effect of Eurycoma longifolia on Sperm Quality of Male Rats

2009 ◽  
Vol 4 (10) ◽  
pp. 1934578X0900401 ◽  
Author(s):  
Kit-Lam Chan ◽  
Bin-Seng Low ◽  
Chin-Hoe Teh ◽  
Prashanta K. Das
Keyword(s):  
Testosterone Level ◽  
Sperm Quality ◽  
Sperm Count ◽  
Male Rats ◽  
Plasma Testosterone ◽  
Seminiferous Tubules ◽  
Albino Rats ◽  
Meoh Extract ◽  
Plasma Testosterone Level ◽  
Etoac Fraction

The present study investigated the effects of a standardized methanol extract of E. longifolia Jack containing the major quassinoid constituents of 13α(21)-epoxyeurycomanone (1), eurycomanone (2), 13α,21-dihydroeurycomanone (3) and eurycomanol (4) on the epididymal spermatozoa profile of normal and Andrographis paniculata induced infertile rats. The standardized MeOH extract at doses of 50, 100 and 200 mg/kg, the EtOAc fraction (70 mg/kg), and standardized MeOH extract at 200 mg/kg co-administered with the EtOAc fraction of A. paniculata at 70 mg/kg were each given orally to male Sprague-Dawley albino rats for 48 consecutive days. The spermatozoa count, morphology, motility, plasma testosterone level and Leydig cell count of the animals were statistically analyzed by ANOVA with a post-hoc Tukey HSD test. The results showed that the sperm count of rats given the standardized MeOH extract alone at doses of 50, 100 and 200 mg/kg were increased by 78.9, 94.3 and 99.2 %, respectively when compared with that of control (p < 0.01). The low count, poor motility and abnormal morphology of the spermatozoa induced by the A. paniculata fraction were significantly reversed by the standardized MeOH extract of E. longifolia (p < 0.001). The plasma testosterone level of the rats treated with the standardized MeOH extract at 200 mg/kg was significantly increased (p < 0.01) when compared with that of the control and infertile animals. The spermatocytes in the seminiferous tubules and the Leydig cells appeared normal. Testosterone level was significantly higher in the testes (p < 0.01) than in the plasma after 30 days of oral treatment with the standardized MeOH extract. Interestingly, eurycomanone (2) alone was detected in the rat testis homogenates by HPLC-UV and confirmed by LC/MS, and may have contributed towards the improvement of sperm quality. Thus, the plant may potentially be suitable for the management of male infertility.

174 EFFECTS OF SMOKING ON PLASMA TESTOSTERONE LEVEL AND ERECTILE FUNCTION IN MALE RATS

2010 ◽  
Vol 9 (2) ◽  
pp. 86-87
Author(s):  
M.G. Park ◽  
K.W. Ko ◽  
M.M. Oh ◽  
D.K. Yoon ◽  
J.J. Kim ◽  
...  
Keyword(s):  
Testosterone Level ◽  
Erectile Function ◽  
Male Rats ◽  
Plasma Testosterone ◽  
Plasma Testosterone Level

Effect of ethyl alcohol on plasma testosterone level in mice

Steroids ◽  
1974 ◽  
Vol 23 (6) ◽  
pp. 921-928 ◽  
Author(s):  
Fouad M. Badr ◽  
Andrzej Bartke
Keyword(s):  
Ethyl Alcohol ◽  
Testosterone Level ◽  
Plasma Testosterone ◽  
Plasma Testosterone Level
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