http://phys.org/ en-us Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. We've heard the clichés: "It was love at first sight," "It's inner beauty that truly matters," and "Opposites attract." But what's really at work in selecting a romantic or sexual partner? http://phys.org/news279527482.html Other Sciences Fri, 08 Feb 2013 06:31:32 EST news279527482 (PhysOrg.com) -- The duration of sexual intercourse differs wildly across the animal kingdom. Now researchers seeking to understand the evolutionary significance of lengthy copulation duration have found evidence that it could signify a choosy male taking the time to assess the suitability of his female mate. http://phys.org/news242636837.html Biology Fri, 09 Dec 2011 07:07:44 EST news242636837 In Sub-Saharan Africa, women who are empowered to make household decisions tend to have sex less often. This is according to a study conducted by researchers at the Johns Hopkins Bloomberg School of Public Health. They examined the relationships between married women's autonomy and the time since most recent sexual intercourse and found that women's position in their household may influence sexual activity. The full article will be published in the October issue of the Journal of Sex Research and is currently featured online as an "editor's choice." http://phys.org/news235823268.html Other Sciences Wed, 21 Sep 2011 11:28:15 EST news235823268 Russian or Soviet cosmonauts never had sex in space in the 50 years of human exploration of the cosmos. And that's official, according to a Russian expert. As for Americans, well, you'd better ask them. http://phys.org/news222675927.html Space & Earth Fri, 22 Apr 2011 07:25:37 EST news222675927 Post-sex blues is not a sexual behaviour commonly discussed, but a Queensland University of Technology (QUT) study of more than 200 young women has found one in three (32.9 per cent) had experienced the phenomenon at some point. http://phys.org/news220694331.html Medicine & Health Wed, 30 Mar 2011 08:59:21 EST news220694331 (AP) -- Teens who text 120 times a day or more - and there seems to be a lot of them - are more likely to have had sex or used alcohol and drugs than kids who don't send as many messages, according to provocative new research. http://phys.org/news208502367.html Medicine & Health Tue, 09 Nov 2010 05:40:01 EST news208502367 (AP) -- Nearly one-tenth of sexually active New York City high school students say they have had at least one same-sex partner, and teens who say they've had sexual contact with both sexes report higher-than-average rates of dating violence, forced sex and risky sexual behavior, a new study says. http://phys.org/news207197127.html Medicine & Health Mon, 25 Oct 2010 03:46:13 EST news207197127 In the brain, dopamine is involved in a number of processes that control the way we behave. If an action results in the substance being released, we are more likely to repeat the action. This applies to actions such as eating, sexual intercourse or winning a competition. However, the same also holds true when individuals take harmful narcotics. Scientists believe that mental illnesses such as schizophrenia can be linked to dopamine imbalances. http://phys.org/news206814512.html Medicine & Health Wed, 20 Oct 2010 17:28:44 EST news206814512 (PhysOrg.com) -- Amyloid protein structures are best known for the troubles they pose in the brains of Alzheimer's patients. Now researchers are trying to exploit their presence in a very different place - in semen - to find a new way to stop HIV. http://phys.org/news204883572.html Chemistry Tue, 28 Sep 2010 09:06:41 EST news204883572 China's health minister said Tuesday he was concerned about the HIV/AIDS situation among migrant workers, but added the Asian nation had managed to contain the "fast spread" of the disease. http://phys.org/news203674354.html Medicine & Health Tue, 14 Sep 2010 09:12:52 EST news203674354 An investigation published in The Journal of Sexual Medicine has found that male partners who express greater support, attention and sympathy to women's chronic vulvovaginal pain may trigger more pain, but also increase sexual satisfaction in female partners. http://phys.org/news203255625.html Medicine & Health Thu, 09 Sep 2010 12:53:56 EST news203255625 Girls are hitting puberty earlier and earlier. One recent study found that more than 10 percent of American girls have some breast development by age 7. This news has upset many people, but it may make evolutionary sense in some cases for girls to develop faster, according to the authors of a new paper published in Psychological Science, a journal of the Association for Psychological Science. http://phys.org/news202473550.html Medicine & Health Tue, 31 Aug 2010 11:39:24 EST news202473550 The context in which adolescent sexual activity occurs can substantially moderate the negative relationship between sexual intercourse and education, according to research to be presented at the 105th Annual Meeting of the American Sociological Association. http://phys.org/news201094489.html Medicine & Health Sun, 15 Aug 2010 12:37:36 EST news201094489 Foreign homestay students who come to Canada to attend high school without their parents are exposed to major health risks such as smoking, drug use and early sexual intercourse, according to University of British Columbia research. http://phys.org/news198250416.html Medicine & Health Tue, 13 Jul 2010 14:50:01 EST news198250416 Viral hepatitis affects more than 500 million people worldwide and is a cause of liver failure and liver cancer. While vaccines are available for hepatitis A and B, this is not the case for hepatitis C, which affects as much as two percent of the population in the U.S. Scientists today are reporting discovery of a virus related to hepatitis C in Asian bats, which may provide insights into the origins of the hepatitis C virus and into the mechanisms by which infectious diseases move from other species to humans. http://phys.org/news197227946.html Medicine & Health Thu, 01 Jul 2010 18:32:39 EST news197227946 For parents wondering when they should talk to their children about sex, the writing may be on the wall — or on their child's Facebook page. http://phys.org/news191912364.html Medicine & Health Sat, 01 May 2010 05:59:38 EST news191912364 An approach designed to reduce HIV/STDs previously used exclusively by academic researchers has successfully been implemented by community-based organizations (CBOs), an important component in national strategies to curtail the spread of HIV, meaning far more "at risk" youths can be reached. http://phys.org/news189785821.html Medicine & Health Tue, 06 Apr 2010 16:20:01 EST news189785821 (PhysOrg.com) -- A team of researchers from the United States and Europe has published new evidence supporting the use of ulipristal acetate as an effective alternative to levonorgestrel (marketed as Plan B®) for emergency contraception. This study was published online Jan. 29, 2010, and also appears in the Feb. 13 print edition of The Lancet. http://phys.org/news186059110.html Medicine & Health Mon, 22 Feb 2010 11:20:03 EST news186059110 The final step in the multidisciplinary approach of gender reassignment therapy in female-to-male transsexuals consists of the construction of a neophallus to allow the patient to void while standing and to have sexual experience after he is accustomed to his new voiding abilities. The main limiting factor is that there is no good substitute for the unique erectile tissue of the penis. The largest retrospective study by Hoebeke et al. evaluates the outcome in 129 female-to-male transsexuals after implantation of a hydraulic erectile prosthesis. http://phys.org/news183141536.html Medicine & Health Tue, 19 Jan 2010 17:00:01 EST news183141536 Sperm, and not just the fluid it bathes in, can transmit HIV to macrophages, T cells, and dendritic cells (DCs), report a team led by Ana Ceballos at the University of Buenos Aires in Argentina. By infecting DCs, which carry the virus and potently pass it to T cells, sperm may play a leading role in spreading HIV. The article appears in the November 23, 2009 issue of the Journal of Experimental Medicine. http://phys.org/news175777938.html Medicine & Health Mon, 26 Oct 2009 12:12:45 EST news175777938 HIV prevalence among African Americans is ten times greater than the prevalence among whites. This racial disparity in HIV prevalence has persisted in the face of both governmental and private actions, involving many billions of dollars, to combat HIV. In the November 2009 issue of the American Journal of Preventive Medicine, researchers from the University of North Carolina at Chapel Hill examine factors responsible for the stark racial disparities in HIV infection in the U.S. and the now concentrated epidemic among African Americans. http://phys.org/news174025683.html Medicine & Health Tue, 06 Oct 2009 06:10:01 EST news174025683 Rates of births to teenage mothers are strongly predicted by conservative religious beliefs, even after controlling for differences in income and rates of abortion. Researchers writing in BioMed Central's open access journal Reproductive Health have found a strong association between teenage birth rates and state-level measures of religiosity in the U.S. http://phys.org/news172389544.html Medicine & Health Thu, 17 Sep 2009 08:20:01 EST news172389544 A surgical procedure known as LUNA (laparoscopic uterosacral nerve ablation) did not result in improvements in chronic pelvic pain, painful menstruation, painful sexual intercourse or quality of life when compared with laparoscopic surgery that does not interrupt pelvic nerve connections, according to a study in the September 2 issue of JAMA. http://phys.org/news171050754.html Medicine & Health Tue, 01 Sep 2009 23:50:01 EST news171050754 (PhysOrg.com) -- As a new mother herself, Brenda Lohman admits to being shocked by the results of a new study she co-authored. It found that among nearly 1,000 low-income families in three major cities, one in four children between the ages of 11 and 16 reported having sex, with their first sexual intercourse experience occurring at the average age of 12.77. http://phys.org/news169399090.html Other Sciences Thu, 13 Aug 2009 16:30:02 EST news169399090 A large proportion (94%) of lymphatic filariasis (LF) patients with hydrocele and their wives report the inability to have a satisfactory sexual life because of this condition. In a new ethnographic study, published on April 21 in the open-access journal PLoS Neglected Tropical Diseases, Bontha V. Babu and his colleagues of the Indian Council of Medical Research highlight the incapacity of hydrocele patients during sexual intercourse, and its impact on marriageability of young patients in rural Orissa, India. http://phys.org/news159515009.html Medicine & Health Tue, 21 Apr 2009 06:43:57 EST news159515009 With sexual activity among adolescents in the United States resulting in over 750,000 teenage pregnancies each year and reports of up to 25 percent of all female adolescents in the US having sexually transmitted infections, researchers and public health officials are looking for those factors that might increase sexual activity in teens. In an article published in the April 2009 issue of the American Journal of Preventive Medicine, researchers found that teenagers who preferred popular songs with degrading sexual references were more likely to engage in intercourse or in pre-coital activities. http://phys.org/news154683399.html Medicine & Health Tue, 24 Feb 2009 07:37:29 EST news154683399 Minutes after having sexual intercourse with her boyfriend, a 35-year-old woman suddenly felt her left arm go weak. Her speech became slurred and she lost feeling on the left side of her face. http://phys.org/news140673653.html Medicine & Health Mon, 15 Sep 2008 05:00:53 EST news140673653