Prenatal effect hinted for some gay men
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Men who have several older brothers have an increased chance of being gay &amp;#151; whether they were raised together or not &amp;#151; a finding researchers say adds weight to the idea that sexual orientation is based in biology.
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Children born to fathers of advancing age are at significantly higher risk of developing autism compared with children born to younger fathers, according a comprehensive study published yesterday that offers surprising new insight into one of the most feared disorders of the brain.
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Researchers have identified a genetic factor that can help predict whether a woman will suffer a risky pregnancy, according to an article in the Oct. 18 issue of The Journal of Experimental Medicine.
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NEW YORK  - Both gay and heterosexual men  are equally likely to aspire to an unattainable body type, or  to harbor a distorted image of their actual body, new research  indicates.
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Multiple genes and not just the sex chromosomes are important in sexual orientation, scientists suggest.
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Giving birth to a boy can increase the likelihood of severe postnatal depression, a study suggests.
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A scientific study has found evidence that male laptop users could be damaging their fertility. Researchers at New York&#39;s State University warned this week that a man balancing a portable computer on his lap
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Mounting evidence is suggesting that as men get older, they face an increased risk of fathering children with abnormalities.
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Being either too thin or too heavy may lower a man&#39;s sperm count, in some cases enough to impair fertility, researchers report.
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Some federally funded abstinence sex education courses tell youngsters that 50% of all American teenage gay men are HIV positive, touching someone&#39;s genitals can make you pregnant and abortion can lead to sterility and suicide, says the Washington Post.
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Men with deep voices have more children, probably because they attract more mates, the lead author of what is said to be the first study to examine the relationship between voice and number of offspring said Tuesday.
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Scientists believe they have discovered how a condition that can threaten pregnancy could occur.
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A Los Angeles fertility clinic has launched what it says is the first dedicated program for gay men wanting to become parents.
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Firstborn sons have higher IQs than their younger brothers, and their social status within the family may explain why, researchers reported on Thursday.
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Scientists in Australia have developed a sperm-sorting machine which may help infertile men to become fathers.
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A small study of female-to-male transsexuals shows that testosterone therapy at "male" dosages significantly increases bone mineral density.
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Men who park a hot computer on their laps for hours every day may be reducing their chances of becoming fathers. A pilot study of 29 men shows that the combination of the legs-together posture required to