Results 31 to 40 of about 223,762 (305)

Seasonal Variation in Serum Testosterone Levels: Evidence from 2 Large Institutional Databases

Urology Research and Practice, 2023
Objective: Seasonal variations in testosterone levels have been reported in some studies, but the results are inconsistent. In this study, we aimed to determine if clinically relevant seasonal variability in testosterone levels exists using a large ...
David Miller, Aaron Gurayah, Alexander Weber, Kyle Schuppe, Mohamadhusni Zarli, Alexandra Dullea, Kathleen Hwang, Ranjith Ramasamy   +7 more
doaj   +1 more source

Testosterone and androstenedione concentrations in human testis and epididymis during the first two years of life [PDF]

, 1983
Testosterone and androstenedione were measured in testicular and epididymal tissue of 37 previously healthy infants between 1 and 24 months of age who died suddenly. In half of the patients elevated plasma levels of cortisol and androstenedione suggested
Eisenmenger, Wolfgang, Dörr, H. G., Bidlingmaier, F., Kuhnle, U., Knorr, D.   +4 more
core   +1 more source

Plasma Testosterone Levels and Atherosclerotic Plaque Gene Expression in Men With Advanced Atherosclerosis

Frontiers in Cardiovascular Medicine, 2021
Aims: Low plasma testosterone levels have been shown to predict worse outcome in men with severe atherosclerotic disease. We hypothesized that a low plasma testosterone level affects disease risk through changes in gene expression in atherosclerotic ...
Floor Groepenhoff, Floor Groepenhoff, Ernest Diez Benavente, Arjan Boltjes, Nathalie Timmerman, Farahnaz Waissi, Robin J. G. Hartman, N. C. Onland-Moret, Gerard Pasterkamp, Hester Den Ruijter   +9 more
doaj   +1 more source

A Validated Age-Related Normative Model for Male Total Testosterone Shows Increasing Variance but No Decline after Age 40 Years [PDF]

, 2014
The diagnosis of hypogonadism in human males includes identification of low serum testosterone levels, and hence there is an underlying assumption that normal ranges of testosterone for the healthy population are known for all ages.
Wallace, W Hamish B, Li, Lucy Q, Lucy Q Li, Thomas W Kelsey, Richard A Anderson, Whelan, Ashley, Ashley Whelan, Lucy Q. Li (641265), Ashley Whelan (641266), Mitchell, Rod T, Richard A. Anderson (64013), Wallace, Hamish, Kelsey, Thomas W, W. Hamish B. Wallace (254093), Richard A. Anderson, Thomas W. Kelsey, Rod T. Mitchell, B. Wallace, Anderson, Richard, W Hamish B Wallace, Anderson, Richard A, W. Hamish, Rod T Mitchell, Thomas W. Kelsey (254095), Rod T. Mitchell (164314), Lucy Q. Li   +25 more
core   +1 more source

Fetal testosterone and autistic traits [PDF]

, 2009
Studies of amniotic testosterone in humans suggest that fetal testosterone (fT) is related to specific (but not all) sexually dimorphic aspects of cognition and behaviour.
Kevin Taylor, Simon Baron‐Cohen, Bonnie Auyeung, Rebecca Knickmeyer, Knickmeyer, Rebecca, Ashwin, Emma, Auyeung, Bonnie; id_orcid, Gerald Hackett, Taylor, Kevin, Hackett, Gerald, Emma Ashwin, Baron-Cohen, Simon   +11 more
core   +1 more source

Patterns of testosterone in male white‐tailed deer (Odocoileus virginianus): Seasonal and lifetime variation

Ecology and Evolution, 2021
Testosterone is strongly associated with the annual development of antlers in cervids, but endocrine research on wild, freely breeding ungulates is often done without repeated capture of known‐aged individuals.
Monet A. Gomes, Stephen S. Ditchkoff, Sarah Zohdy, William D. Gulsby, Chad H. Newbolt   +4 more
doaj   +1 more source

Comparison of Intratesticular Testosterone between Men Receiving Nasal, Intramuscular, and Subcutaneous Pellet Testosterone Therapy: Evaluation of Data from Two Single-Center Randomized Clinical Trials

The World Journal of Men's Health, 2023
Purpose: Testosterone replacement therapy (TRT) can potentially cause decreased spermatogenesis and subsequent infertility. Recent studies have suggested that 17-hydroxyprogesterone (17-OHP) is a reliable surrogate for intratesticular testosterone (ITT)
Parris Diaz, Rohit Reddy, Ruben Blachman-Braun, Isaac Zucker, Alexandra Dullea, Daniel C. Gonzalez, Eliyahu Kresch, Ranjith Ramasamy   +7 more
doaj   +1 more source

Sex-role orientation in men is related to salivary testosterone levels [PDF]

, 2013
Previous research has implicated the involvement of androgens in sex-role orientation in males, from studies of 2nd to 4th digit ratio (a purported marker of prenatal testosterone).
Al-Dujaili, Emad A. S., Smith, Miriam J. Law, Law Smith, Miriam Jane, Law Smith, Miriam J., Al-Dujaili, Emad A.S., Sharp, Martin A, Deady, Denis K., Sharp, Martin A., Deady, Dennis   +8 more
core   +1 more source

Safety Aspects and Rational Use of Testosterone Undecanoate in the Treatment of Testosterone Deficiency: Clinical Insights

Drug, Healthcare and Patient Safety, 2023
Katherine Campbell,1 Akhil Muthigi,1 Armin Ghomeshi,2 Kyle Schuppe,3 Max D Sandler,4 Ranjith Ramasamy1 1Desai Sethi Urology Institute, University of Miami, Miami, Fl, 33136, USA; 2Herbert Wertheim College of Medicine, Florida International University ...
Campbell K, Muthigi A, Ghomeshi A, Schuppe K, Sandler MD, Ramasamy R   +5 more
doaj  

Female collared flycatchers adjust yolk testosterone to male age, but not to attractiveness [PDF]

, 2004
The differential allocation hypothesis predicts that females invest more resources into reproduction when mating with attractive males. In oviparous animals this can include prefertilization decisions such as the production of larger eggs and the ...
Garamszegi, L., Schwabl, Hubert, Schwabl, H., Gábor Michl, Török, János, T\uf6r\uf6k, J\ue1nos, P\ue9czely, P\ue9ter, János Török, Michl, G\ue1bor, Peczely, P., László Z. Garamszegi, Torok, J., Péczely, Péter, Péter Péczely, Garamszegi, L\ue1szl\uf3, Hubert Schwabl, Michl, G., Garamszegi, László Zsolt   +17 more
core   +1 more source