Male twins 'can reduce fertility'
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A twin brother's male hormones  can reduce his female twin's chances of giving birth, a study claims.
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Research from Australia in this week&#39;s issue of THE LANCET (p 1513) suggests that tall girls given oestrogen therapy in adolescence to reduce adult height are more likely to experience later fertility problems than the general population.
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Here's one more reason not to smoke -- smoking may damage sperm, passing along genetic damage to a man's children, Canadian researchers report.
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Diet and lifestyle play a far smaller  role than genetic factors in determining whether a child  becomes overweight, according to a British study of twins  published on Thursday.
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Asian couples undergoing IVF treatment are less likely to have a baby than Caucasian couples, research suggests.
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Taking regular hot baths may make men infertile, say US researchers.
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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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Scientists proposed a new theory this week for how identical twins are formed as embryos, in a discovery that may improve a broad range of artificial reproduction techniques.
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A recent study&#39;s findings, published in the journal &quot;Human Reproduction,&quot; raise concern with how laptops are being used by men, specifically regarding increased temperature in the scrotal area.
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NEW YORK  - Findings from a new study suggest that both high and low birth weights increase the risk of testicular cancer in men. The reason for this finding is unclear.
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Men and teenage boys who use laptop computers may be damaging their fertility, a US study shows. The combination of the heat generated by the computer and the posture needed to balance
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Â· Only 4% may take up extra paternity leaveÂ· Work-life balance has lost priority, say campaigners
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Estrogen treatment given to tall  adolescent girls to reduce their height can lead to fertility  problems, Australian scientists said on Friday.
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Women who have a male twin are less likely to marry and have children, perhaps because of being exposed to their brother&#39;s testosterone for nine months in the womb, researchers reported on Monday.
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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
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MONDAY, Jan. 7 (HealthDay News) -- Men who father children may be at higher risk of prostate cancer compared to those who forego the life experience, a Danish study suggests.
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Here&#39;s one more reason not to smoke  -- smoking may damage sperm, passing along genetic damage to a  man&#39;s children, Canadian researchers report.