Alcohol's effects on testosterone
...e levels in the plasma and brain of both males and females and thus could elicit some of the behavioral effects associated with increased testosterone levels, such as increased libido or aggression." Rasmussen added that these findings join those of two other studies in which alcohol administration increased...First study to show the potential for effective prevention of migraine with an AT1 receptor blocker
...hest prevalence between the ages of 25 and 55 with females more susceptible than males. Attacks in adults normally last between four and 72 hours and result in an estimated annual loss of almost six days per 1000 working people. Alleviating the burden of migraine allows sufferers to live normal lives, unhi...Biologists raising baby loggerhead turtles for conservation find disturbing gender trend
...st in their most-southern U.S. range. Only nesting females can be counted, since the males remain at sea. In areas south of Jacksonville, Fla., female loggerhead counts that were declining by 2 percent each year are now increasing at a rate of 4 percent annually, Crowder said. From Jacksonville to the limi...Got milk? Scientists discover key lactation gene
...s soon noticed that pups from the XOR heterozygous females all died ~12 days postpartum. The researchers foun...ithelium. The inability of heterozygous XOR-mutant females to secrete milk fat droplets causes severe tissue damage, resulting in the collapse of the mammary e...Toy choice among boys, girls a matter of monkey business
...there may be perceptual cues that attract males or females to particular objects such as toys." In the experi...r objects that invite movement. On the other hand, females may have evolved preferences for object color, relating to their roles as nurturers, Alexander notes...Ovary gene may explain certain aspects of infertility
...t healthy ovaries transplanted into Fmn2-deficient females rescued pregnancy loss, whereas transplant of Fmn2-deficient ovaries into healthy females destroyed the healthy females' ability to produce offspring. Furthermore, examination of the experi...Scientists find insects can alter plant chemistry to help them find mates
...s," Hanks said. "This is interesting, because the females are inside the stems, so they are not producing ph...iving inconspicuously inside of the plants. Adult females emerge from dead stems of the plants, mate and lay eggs in live plant stems, forming galls that prot...Scientists identify gene that controls sex drive in male flies
...e sex-specific features that distinguish males and females of any species are genetically predetermined. Usin...t exclusively in males and motivates them to court females It is interesting and unexpected that products synthesized from male fat cells influence sexual beha...Health care rationing in Germany
... of the patients. The most expensive patients were females in Westphalia-Lippe aged 20 to 49 years who died of cancer. Average costs of 36,300 DM (18,560 EUR) exceed treatment expenses for the younger group four to five times. In Thuringia costs of treatment were highest for those 55 to 59 year old women who...When it comes to sperm competition, size can matterits the female who holds the aces
...d determining whose sperm reaches the elusive egg, females control both the playing field and the rules of th...study demonstrates, unambiguously, the active role females play in determining the conditions under which sperm compete inside the female reproductive tract," ...Rutgers anthropologist, Fossey Fund official, announces plan to save Rwanda's mountain gorillas
... Scientific Information Resources Center, the four females lost could have led to the birth of as many as 427...his analysis underscores the central importance of females to the future growth and survival of this population. For a small population like this, the death o...Study to determine if infidelity among birds an attempt to avoid inbreeding, diversify genes
...onal biologists examines how the mating tactics of females of three species of socially monogamous shore bird...tery, he said, "We don't have a good sense of how females are doing this; how they assess how similar they are genetically to a mate," Sandercock said. "It im...Sex and genetics: Why birds are unfaithful to their partners
...uctive behaviors. Extra-pair paternity occurs when females copulate with males other than their social partne...y on the three shorebird species now suggests that females seek extra-pair copulations to avoid inbreeding depression or other negative effects of genetic simi...Science picks - leads, feeds and story seeds
...and Mating Butterfly Style - Male butterflies find females by sight and use chemicals called pheromones at close range. If the female accepts the male, they couple end to end and may go on a short courtship flight. They may remain coupled for an hour or more, sometimes overnight. The male passes a sperm p...Male birds' ability to learn song affects female mating response
...songs they attempted to learn. They found that the females preferred those songs that came closest to wild-ty..., experimental and field observations showing that females were interested in song only contrasted the presence or absence of song, or relatively gross feature...Sex-pheromone link to insect evolution
...witched on, changing the pheromone components that females use to attract males for mating. The entomologist...lective channel that sets out to mate." Soon other females with the delta-14 gene mate with other rare respondent males. Eventually, over time, the males and f...Long-term studies show most intersex adults happy with gender assignments at birth
...type and an intersex syndrome. The 34 males and 41 females were asked specific questions to determine their knowledge about their condition, whether they were satisfied with their level of understanding, and whether they wanted more information. Fifty-three percent of men, and 54 percent of women had a good ...Rockefeller researchers provide the first functional evidence for mammalian pheromone receptors
...ir general behavior. However, the mutant males and females displayed clear differences in aggression and sexu...d to their normal counterparts. Normally, nursing females are aggressive toward other lab mice that intrude or invade their nest. The nursing mutant females, ...New drug that enhances glutamate transmission in the brain being evaluated for fragile X
...st males have mental retardation, only one-half of females have intellectual impairment (which tends to be milder in females); the rest have either normal IQ or learning disabilities. Emotional and behavioral problems are common in both sexes. Currently there are no therapeutic treatments for the learning ...Men are faster than women. but does that mean bets should always be placed on colts?
...ng that Greyhound owners and trainers believe that females can compete successfully with males. Conclusion... operated on the running ability of both males and females of these species. In contrast, archeological evidence suggests that human ancestors were tool users...