Female mice that were in pain, whether genital or nongenital, spent 50 % less time
with their male partners, implying a decrease in sexual motivation.
The mutation in this case can be compatible either
with male or female development, presumably due to other genes or chance events.
«I thought a smartphone microscope could be an easy way to look at problems
with male fertility,» he says.
But results showed male players who identified closely
with male characters in violent - sexist games were the ones who showed the least empathy.
The researchers found that male gamers with female avatars used more emotional phrases and employed smile emoticons more often than
those with male avatars.
A study by researchers at Columbia University's Mailman School of Public Health found that female students, racial / ethnic minorities, and students of lower socioeconomic status are particularly affected, with teens in these categories less likely to report regularly getting seven or more hours of sleep each night compared
with their male counterparts, non-Hispanic white teenagers, and students of higher socioeconomic status, respectively.
A 2009 analysis of same - sex animal romance notes, among other things, that half of all sexual interactions by male bottlenose dolphins occur
with male partners, and male - male pairings account for up to 26 percent of bearded vulture mountings.
But when boys play them and identify
with the male characters in the game, it can lead to agreement with some pretty disturbing beliefs about masculinity and how to treat women.»
Sometimes females would rather GG - rub with each other than copulate
with a male.
Those preferences could coevolve
with male traits as opinion in a population changes, one feeding back on the other in a scientifically interesting way, the same way short skirts can come in and out of fashion even though they say nothing about the woman wearer.
Women younger than 40, those using donor oocytes and
those with male partner - related infertility that was treated with either intracytoplasmic sperm injection or sperm donation achieved live birth rates after five or six cycles, taking a median two years of trying, which were similar to rates in couples who were trying to conceive and were not using any form of treatment after an average of one year.
The eggs developed into healthy offspring, even though neither female had been in recent contact
with a male of that species.
One Komodo, named Flora, lives at the Chester Zoo in England and has never been kept
with a male; yet a few months ago she laid a clutch of 11 eggs, eight of which seem to be developing normally and may hatch as soon as January.
He is currently investigating the effects of single - parent desertion on growth and survival of offspring, and how females adjust their molt and migration schedules to deal
with male desertion.
The difference is due to gender disparity in the number of songs,
with male singers performing a considerably higher percentage of popular songs than female performers during that time period.
We believe the male homosexual should work
with a male therapist, and the lesbian should work with a woman.»
The researchers collected dermal papilla cells from seven volunteers who had been diagnosed
with male - pattern baldness.
During the process, the male was determined to have damaged sex organs, perhaps due to a fight
with another male decades ago.
The four stages of the reproductive cycle included mated but not pregnant; pre-lactation pregnancy; early lactation pregnancy and late lactation pregnancy, along
with a male - female comparison that revealed unique expressed genes corresponding to each stage.
Giving a whole new meaning to «pregnancy brain,» a new study shows that male DNA — likely left over from pregnancy
with a male fetus — can persist in a woman's brain throughout her life.
With natural breeding unsuccessful, scientists recently artificially inseminated the female
with the male's sperm.
Among cycles
with male factor infertility, ICSI use increased from 76.3 percent to 93.3 percent; for those without male factor infertility, ICSI use increased from 15.4 percent to 66.9 percent.
The findings raise an important question for women
with male partners who are infected with HIV.
The introduction of ICSI in 1992 revolutionized the treatment of couples
with male factor infertility (infertility due to abnormal semen characteristics, abnormal sperm function, or surgical sterilization), and made paternity possible for a large proportion of men with no measurable sperm count.
One of the female children has her own children
with a male who has the mm combination of alleles.
Song orderliness is also known to be associated
with male nightingale age.
In the lab, and in field experiments, female brown rats readily enter trap boxes baited
with the male brown rat's sex pheromone.
With male pairs in captivity doing this, they both get mating opportunities.
Partway through the balding process, she retained a fringe on the back of her head, much like a 50 - year - old man
with male - pattern baldness.
Adult offspring exposed in utero had increased liver fibrosis and inflammation,
with both male and female mice affected.
She has found that female faculty members at her institution almost always have less favorable views of their department's climate — reflected in the department's unspoken expectations and interpersonal relations — compared
with male faculty.
She also found the «impact score» assigned to patents with the names of women — calculated using the number of times these patents were cited in other filings — was much lower compared to patents
with male names.
At the end of the study, the researchers found that the models
with male colouration had been attacked more than the models with female colouration.
«The attitudes I faced, coupled
with the male - dominated environment, were probably what drove me out of physics,» she says.
Moreover, although the offspring of such interspecies unions are often sterile, some of the females are quite the opposite: they can reproduce without even having sex
with a male.
Since they don't have to worry about serious fights
with their male neighbors, the female - like males can horn in on the breeding males» territories and their mates, the scientists report online today in Biology Letters.
Females paired
with a male with a large forehead patch didn't cheat, whereas most of the females whose male had a small patch cheated at least once — and did so in the middle of their fertile period.
They constructed a T - shaped aquarium of opaque plastic
with a male trapped behind wire gauze and invisible to the female in each arm of the «T.» Water flowed along the males» bodies into the stem of the «T,» carrying with it any male scents, including testosterone.
Writing in the January 2012 issue of Alcoholism: Clinical and Experimental Research, principal investigator Claudia Fahlke from the Department of Psychology at the University of Gothenburg in Sweden and her colleagues found that alcohol's ability to reduce serotonin neurotransmission, was «telescoped» in alcoholic women compared
with their male counterparts.
Their most poignant find was this dead female harlequin frog splayed in the shallow waters
with a male trying to mate with her.
The bats copulate dorso - ventrally,
with the male mounting the female from behind.
As a result, Pitnick and Belote are better able to determine what happens when a female mates twice (i.e., once
with a male of her own species and once with member of a related species.)
At 20 predetermined spots, workers opened fat cardboard tubes packed
with male mosquitoes shipped overnight in a cooler from Kentucky — 20,000 mosquitoes in all.
Given that HP - I is transferred to the female along
with the male's semen, Duvall and her colleagues wondered if it might play a role in switching off her sex drive.
During the males» initial encounters
with male or female visitors, researchers observed little mating or fighting, and the same neurons lit up in response to both sexes.
By injecting specialized trout sex cells into sterilized but otherwise healthy salmon embryos, Japanese scientists wound up
with male salmon that ejected trout milt (semen) and female salmon bearing trout eggs.
Just by looking at the activation of these two neural populations, the scientists could reliably determine whether an animal was interacting
with a male or a female.
«Such gender differences may reflect the increased competition female scientists experience, old fashioned academic conventions
with male exclusive networks, and / or our evolutionary history in which particularly male - male alliances were favoured,» says lead author Jorg Massen.
In the new paper, George Cotsarelis of the University of Pennsylvania and his team found that a compound known as prostaglandin D2 (PD2) was elevated in the blood of men
with male - pattern baldness.
Most likely, they were offering sex to curry favour
with the male or to prevent him from impregnating other females.