Results 21 to 30 of about 373,589 (236)

Exogenous Testosterone Enhances the Reactivity to Social Provocation in Males

open access: yesFrontiers in Behavioral Neuroscience, 2018
Testosterone affects human social behavior in various ways. While testosterone effects are generally associated with muscular strength and aggressiveness, human studies also point towards enhanced status–seeking motives after testosterone administration.
Lisa Wagels   +13 more
doaj   +1 more source

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

open access: yesUrology 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   +7 more
doaj   +1 more source

Developmental changes in the histological structure of the testes, and testosterone profiles in male guinea fowls (Numida meleagris) [PDF]

open access: yes, 2017
Owing to the paucity of information on the reproductive biology of guinea fowls, a study involving a total of 66 males was conducted, and documented the developmental changes in histological structure of the testes of guinea cocks from hatching until ...
Abdul-Rahman, Iddriss I.   +2 more
core   +1 more source

Measurement of Fecal Testosterone Metabolites in Mice: Replacement of Invasive Techniques [PDF]

open access: yes, 2020
Testosterone is the main reproductive hormone in male vertebrates and conventional methods to measure testosterone rely on invasive blood sampling procedures.
Auer, Kerstin E.   +5 more
core   +1 more source

Contribution of the adrenal gland to the production of androstenedione and testosterone during the first two years of life [PDF]

open access: yes, 1986
Androstenedione and testosterone were measured in whole adrenal glands of 56 previously healthy boys who died suddenly between birth and 2 yr of age. In each adrenal gland, the concentration of androstenedione considerably exceeded that of testosterone ...
Bidlingmaier, F.   +4 more
core   +1 more source

Effect of soy in men with type 2 diabetes mellitus and subclinical hypogonadism: a randomised controlled study [PDF]

open access: yes, 2016
Context: Isoflavones found in soy products have a chemical structure similar to estrogen, leading to concerns of an adverse estrogenic effect in men, particularly in those with type 2 diabetes mellitus (T2DM) who have low testosterone levels due to ...
Atkin, Stephen L.   +5 more
core   +1 more source

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

open access: yesEcology 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   +4 more
doaj   +1 more source

Wearing colored glasses can influence the exercise performance and testosterone concentration [PDF]

open access: yes, 2018
Perception of red color is associated with higher testosterone concentration and better human performance. Thus, we evaluated the acute effects of wearing colored-lens glasses on the YoYo intermittent endurance exercise test 2 (YoYoIE2) performance ...
Campos Souza, Markus Vinicius   +6 more
core   +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

open access: yesThe 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   +7 more
doaj   +1 more source

Time-varying testosterone level and risk of myocardial infarction and stroke among hypogonadal men: a longitudinal study in Germany [PDF]

open access: yesJournal of Men's Health, 2022
Background and objective: Findings on the association between testosterone and cardiovascular risk in men have been inconsistent. Previous studies investigated this association based on testosterone level measured at one single point in time (e.g ...
Xiao Zhang   +7 more
doaj   +1 more source

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