Hello. Thanks for visiting our evolutionary philosophy of human sexuality pages. We are currently researching good quality sites relating to our biological and cultural sexual evolution - as a way of collecting and presenting the most important / latest knowledge and research.
Below you will find summaries of articles & websites on Human
Hormones: Testosterone, i.e. latest research on the function and
stimulation of male and female sex hormones, evolutionary studies, human
anatomy, low levels of testosterone in men, erections, replacement therapy,
hormones & human behavior, masculinity, emotions, violence, lust etc.
Compared with other search terms, 'testosterone' gets relatively few searches (though it is significantly higher than other hormones, such as oestrogen and oxytocin).
The top ten related searches for testosterone are;
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We hope you find the following Human Hormones: Testosterone articles &
websites interesting, informative and useful.
Karene Jade Howie
From the website: 'The definition of a hormone is a chemical substance produced by an endocrine gland that has a specific effect on the activities of other organs in the body.
.. Androgens are sex hormones produced primarily by a male's testes, but are also produced in small amounts by the female's ovaries and the adrenal gland, an organ found in both sexes. Androgens help trigger the development of the testes and penis in the male fetus. They jump start the process of puberty and influence the development of facial, body and pubic hair, deepening of the voice, and muscle development, the male secondary sex characteristics.
After puberty, androgens, specifically testosterone, play a role in the regulation of the sex drive. Large deficiencies of testosterone may cause a drop in sexual desire, and excessive testosterone may heighten sexual interest in both sexes. However, testosterone levels are poorly correlated with sexual interest and drive when they are within the average range. Sex drive is much more likely to be affected by external stimuli (sights, sound, touch) than by variations in sex hormones, except in extreme cases.
... There is no evidence whatsoever to suggest that because women have less testosterone than men do, they have lower sexual interest than their male counterparts. Instead, it seems that women detect and react to much smaller amounts of testosterone in their circulation than men do.'
The testosterone-fueled American male may be losing his punch.
Over the past two decades, levels of the sex hormone in U.S. men have been falling steadily, a new study finds.
For example, average total testosterone levels in men aged 65 to 69 fell from 503 nanograms/decileter (ng/dL) in 1988 to 423 ng/dL in 2003.
The reasons for this trend are unclear, said researchers at the New England Research Institutes in Waterdown, Mass. They noted that neither aging nor certain other health factors, such as smoking or obesity, can fully explain the decline.
Low levels of testosterone hastened the development of Alzheimer's-like disease in mice but testosterone replacement prevented that decline, U.S. researchers report.
The findings, reported in the Dec. 20 issue of the Journal of Neuroscience, suggest that testosterone based hormone therapy may prove effective in preventing and treating Alzheimer's disease in aging men, say a team from the University of Southern California.
Few studies have assessed the role of pituitary and gonadal hormones on
age related changes in sexual behavior in healthy men. We conducted an evaluation
of sexual function and behavior in 77 healthy married men aged 45 - 74 years.
Significant age related decreases in sexual desire, sexual arousal and activity, and increases in erectile problems were noted.
Page Title: 'Men's Health: Testosterone. Information on Male
& Female Sex Hormones, Human Male Body, Testes, Erections, Orgasm, Behaviour,
Emotions, Lust, Violence'.
Want to be Involved? Join us in this research, which provides an excellent opportunity to present to the world the latest knowledge about the thing we all find most interesting - sex! The work will not just benefit humanity, it will profoundly enhance your own sexuality as you learn more about our complex and diverse sexual evolution.
We seek help in finding the latest scientific (evolutionary) research on our biological and cultural sexual evolution and distributing content (overviews / summaries) to relevant pages.
This site is well respected. We are listed as the Top Philosophy Website on the Internet with around 600,000 page views each week. So your contributions will be seen and read, and will be providing humanity with a great source of wisdom about a very important subject (that currently suffers due to cultural / religious myths).
If you would like to be involved (or have comments about this website) please write to us. Many thanks! Karene
Analyse any human emotion, no matter how far it may be removed from the sphere of sex, and you are sure to discover somewhere the primal impulse, to which life owes its perpetuation. ... The primitive stages can always be re-established; the primitive mind is, in the fullest meaning of the word, imperishable. ... Mans most disagreeable habits and idiosyncrasies, his deceit, his cowardice, his lack of reverence, are engendered by his incomplete adjustment to a complicated civilisation. It is the result of the conflict between our instincts and our culture. (Sigmund Freud)
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Please use Facebook Connect (below) to add your questions / comments - the best questions and answers will be added to the page.
Karene (September, 2012)
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