Epigenetics – how gene expression is regulated by temporary switches, called epi-marks – appears to be a critical and overlooked factor contributing to the long-standing puzzle of why homosexuality occurs.
HIV epidemics are emerging in several countries in the Middle East and North Africa among men who have sex with men, a term that encompasses gay, non-gay identified homosexual men, and transgendered and bisexual men.
About 7,000 people are being infected with AIDS each day and about half of the 33 million people with HIV do not know they have it, according to a UN report released to mark the disease's 30th anniversary.
Heterosexuals who take daily AIDS drugs reduce the risk of being infected by the human immunodeficiency virus (HIV) by nearly two-thirds, ground-breaking studies said on Wednesday.
The harassment, discrimination and negative feelings about homosexuality that black gay and bisexual men often experience can contribute significantly to mental health disorders such as depression and anxiety, ...
Homosexual men taking bicalutamide for prostate cancer were much more likely to report sexual problems during treatment than heterosexual patients, according to a study in the July issue of the urology journal BJUI.
Brazil said Monday its AIDS epidemic was under control, with a 0.61 percent cut in new cases between 2009 and 2010, although a rise among young homosexuals was a cause for concern.
Homosexuality has been illegal in Tanzania since colonial times. This legislation is still in force, and during the first 30 years of the HIV epidemic homosexuals were almost never mentioned in HIV prevention ...
Sent to a center offering to "cure" her attraction to women, Denisse Freire was raped and tortured—in a practice Ecuadoran authorities admit has been tolerated for too long.
(Medical Xpress)—Academic staff in the Research School of Psychology at The Australian National University have strongly rejected the view reported in the media today that homosexuality carries with it ...
(AP) -- A prominent retired psychiatrist is apologizing to the gay community for a decade-old study that concluded some gay people can go straight through what's called reparative therapy.
Russia in 2011 saw a rise of five percent in the number of new HIV infections to 62,000 cases amid worrying signs that heterosexuals and women are increasingly at risk, its chief doctor said Monday.
A large study of gay brothers adds to evidence that genes influence men's chances of being homosexual, but the results aren't strong enough to prove it.
Bisexual men are less likely to disclose and more likely to conceal their sexual orientation than gay men. In the first study to look at the mental health of this population, researchers at Columbia University's Mailman School ...
Homosexuality is romantic or sexual attraction or behavior between members of the same sex or gender. As a sexual orientation, homosexuality refers to "an enduring pattern of or disposition to experience sexual, affectional, or romantic attractions" primarily or exclusively to people of the same sex; "it also refers to an individual's sense of personal and social identity based on those attractions, behaviors expressing them, and membership in a community of others who share them."
Homosexuality is one of the three main categories of sexual orientation, along with bisexuality and heterosexuality, within the heterosexual-homosexual continuum (with asexuality sometimes considered the fourth). Scientific and medical understanding is that sexual orientation is not a choice, but rather a complex interplay of biology and environment. Although some religious sects hold the view that homosexual activity is sinful or dysfunctional behaviour, research and studies show that homosexuality is a normal and positive variant of human sexuality. Though homosexuality is not in itself a source of negative psychological effects, prejudice and discrimination against homosexual and bisexual people has been shown to cause psychological harm.
The most common terms for homosexual people are lesbian for women and gay for men, though gay is also used to refer generally to homosexual men and women. The number of people who identify as gay or lesbian—and the proportion of people who have same-sex sexual experiences—are difficult for researchers to estimate reliably for a variety of reasons. In the modern West, according to major studies, 2% to 13% of the population is homosexual or has had some form of same-sex sexual contact within his or her lifetime. A 2006 study suggested that 20% of the population anonymously reported some homosexual feelings, although fewer participants in the study identified themselves as homosexual. Homosexual behavior is also widely observed in animals.
Many gay and lesbian people are in committed same-sex relationships, though only recently have census forms and political conditions facilitated their visibility and enumeration. These relationships are equivalent to heterosexual relationships in essential psychological respects. Homosexual relationships and acts have been admired, as well as condemned, throughout recorded history, depending on the form they took and the culture in which they occurred. Since the end of the 19th century, there has been a movement towards increased visibility, recognition and legal rights for homosexual people, including the rights to marriage and civil unions, adoption and parenting, employment, military service, and equal access to health care.