Do gay men have less testosterone levels
Researchers at the Masters and Johnson sex research in stitute in St. Louis have found that young men who are pre dominantly or exclusively homosexual generally have lower levels of the male sex. Therefore, the theory goes, a low "dose" of these alleles enhances the carrier's chances of reproductive success. There are two or more ways this might happen. But how does it fit with Darwin's theory of evolution?
In the last two decades, dozens of scientific papers have been published on the biological origins of homosexuality - another announcement was made last week. There is some evidence for this second theory. Macklemore and Ryan Lewis's hit song Same Love, which has become an unofficial anthem of the pro-gay marriage campaign in the US, reflects how many gay people feel about their sexuality.
The allele - or group of genes - that sometimes codes for homosexual orientation may at other times have a strong reproductive benefit. Among the homosexuals, the 13 with some heterosexual experience had higher testosterone levels than. Reproductive Biology Research Foundation researchers find that young men who are predominantly or exclusively homosexual generally have lower levels of male sex hormone testosterone in their blood.
Every now and then a family member receives a larger dose that affects his or her sexual orientation, but the allele still has an overall reproductive advantage. Plasma estrone, dihydrotestosterone, luteinizing hormone (LH), and percentage-free testosterone levels were determined in 26 predominantly or exclusively homosexual males (20 to 33 years of age) and in an age-matched control group.
It's possible that different mechanisms may be at work in different people. But scientific opinion is with Macklemore. One possibility is that the allele confers a psychological trait that makes straight men more attractive to women, or straight women more attractive to men. The overall mean testosterone level for the homosexuals was somewhat lower than for a group of heterosexual controls, but the range of values for the two groups showed considerable overlap.
What's different and what's alike between these two kinds of health care providers? Microsoft TO-DO 就是这样一个能充分体现任务储存、整理、排序、实现和回顾的工具，而且，拖动、移动等一些手势操作，以及手机端、电脑端、网页端多平台同步的功能相较于纸质清单更 . Plasma testosterone levels were measured in 28 homosexual men and correlated with psychological variables. But since gay and lesbian people have fewer children than straight people, a problem arises.
Scientists don't know the answer to this Darwinian puzzle, but there are several theories. Because some of these traits are organized by prenatal steroids, including testosterone, homosexual subjects were, on average, exposed to atypical endocrine conditions during development (atypical for their genetic/gonadal/genital sex; female-type endocrine conditions in male homosexuals and male-type endocrine conditions in female homosexuals).
Since the early s, researchers have shown that homosexuality is more common in brothers and relatives on the same maternal line, and a genetic factor is taken to be the cause. It mocks those who "think it's a decision, and you can be cured with some treatment and religion - man-made rewiring of a predisposition".
Although the homosexual and control groups showed a broad overlappin . Plasma testosterone levels were measured in 28 homosexual men and correlated with psychological variables. Exposure to a high concentration of testosterone during a critical phase of development would lead to a male-typical orientation (attraction to women), whereas a lower embryonic exposure to steroids would lead to a female-typical orientation (attraction to men)'.
Another way a "gay allele" might be able to compensate for a reproductive deficit is by having the converse effect in the opposite sex. For example, an allele which makes the bearer attracted to men has an obvious reproductive advantage to women. The overall mean testosterone level for the homosexuals was somewhat lower than for a group of heterosexual controls, but the range of values for the two groups showed considerable overlap.
扩展资料： 唱名法：solmization用若干特定的音节来表示音阶中各音级的唱法。 现今被广泛采用的唱名为：do、re、mi、fa、sol、la、si。 分固定唱名法与可动唱名法两种。 1、固定唱名法 . A minority of gay people disagree, maintaining that sexuality is a social construct , external , and they have made a conscious, proud choice , external to take same-sex partners. The evolution of lesbianism is relatively understudied - it may work in a similar way or be completely different.
You know what M.D. means, but what does D.O. mean? Most of the theories relate to research on male homosexuality. Also relevant - although in no way proof - is research identifying physical differences in the brains of adult straight and gay people, and a dizzying array of homosexual behaviour in animals. do while循环 循环执行步骤： 第一，先进行循环控制变量初始化（在do while之前）； 第二，执行循环体； 第三，执行循环控制变量增量； 第四，判断循环终止条件，如果判断 . do和does 的区别和用法 1、作为实义动词/行为动词，都是“做”的意思，都是一般现在时，主语是第三人称单数用does，其余人称用do ;.
This would compensate for gay people's lack of reproduction and ensure the continuation of the trait, as non-gay carriers of the gene pass it down. This requires a nuanced approach to treatment that balances HIV care with hormone therapy. Stress and Mental Health Homosexual men often experience higher levels of stress due to societal stigma or discrimination, which can elevate cortisol levels.
Plasma estrone, dihydrotestosterone, luteinizing hormone (LH), and percentage-free testosterone levels were determined in 26 predominantly or exclusively homosexual males (20 to 33 years of age) and in an age-matched control group. If it appears in a man's genetic code it will code for same-sex attraction, but so long as this happens rarely the allele still has a net evolutionary benefit.
Low T can develop due to a variety of factors, some universal and others more specific to the gay community: Testosterone levels naturally decline by about 1% per year after the age of 30, leading to gradual changes in energy, mood, and physical health. It's becoming scientific orthodoxy. For gay men living with HIV, certain antiretroviral drugs can affect testosterone production.