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Physical factors that can affect libido include endocrine issues such as hypothyroidism, the effect of certain prescription medications (for example flutamide), and the attractiveness and biological fitness of one's partner, among various other lifestyle factors.
According to data from the Journal of Zhejiang University–Science, male testosterone levels exhibit a rhythm that corresponds to recent sexual activity.. Testosterone appears to be a major contributing factor to sexual motivation in male primates, including humans.
Many studies associate the sex hormone testosterone with sexual desire. [3] Another hormone thought to influence sexual desire is oxytocin. Exogenous administration of moderate amounts of oxytocin has been found to stimulate females to desire and seek out sexual activity. [9] In women, oxytocin levels are at their highest during sexual activity.
Testosterone levels peak between 3 a.m. and 8 a.m. for men with traditional sleep patterns, Dr. Patel says. When you don’t get enough sleep , a situation many Americans are chronically in , your ...
Testosterone levels increase in adolescence after puberty and into early adulthood, and naturally decline over time, usually starting in a man’s 40s or fifties. However, this drop now seems to ...
Factors affecting testosterone levels may include: Age: Testosterone levels gradually reduce as men age. [162] [163] This effect is sometimes referred to as andropause or late-onset hypogonadism. [164] Exercise: Resistance training increases testosterone levels acutely, [165] however, in older men, that increase can be avoided by protein ...
Lower Testosterone Levels. Disrupted sleep can also affect testosterone levels. Testosterone levels are generally at their highest during REM sleep, a stage of sleep with rapid eye movement (REM ...
The biological aspects of human sexuality deal with the reproductive system, the sexual response cycle, and the factors that affect these aspects. They also deal with the influence of biological factors on other aspects of sexuality, such as organic and neurological responses, [14] heredity, hormonal issues, gender issues, and sexual dysfunction.