Age difference is key to having most kids: study
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To have the most children, men should  find a partner six years younger and women a mate four years  older, Austrian researchers said on Wednesday.
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Â· Study of seven-year-olds shows wide gender gap Â· Conservatives accuse ministers of complacency
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More than three-quarters of children who were born before the 26th week of pregnancy are affected by cognitive and neurologic impairments by the time they reach school age, British researchers report.
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Taking care of a chronically-ill child can add a decade or more to the biological age of a mother&#39;s cells, according to a study of the effects of prolonged stress on the body.
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The average age when children are successfully toilet trained is going up, and new research has identified certain factors related to this trend.
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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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Having sex is the high point of most  women's' days, while commuting is the low point. And most women  like being with their kids less than they will admit, according  to a study published on Thursday.
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Exercise may hold the key to youth, according to a study published on Monday which showed people who keep fit are up to nine years biologically younger than those who do not.
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Children born to older fathers are more likely to develop schizophrenia when they grow up, suggests the largest study of the issue to date.
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NEW YORK  - Approximately 65 percent of  young children befriend imaginary companions, and nearly  one-third continue to play with them through age 7, new  research shows.
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Eight in 10 of the nation&#039;s youngest children &amp;#151; babies up to age 6 &amp;#151; watch TV, play video games or use the computer for about two hours on a typical day. A third live in homes where the TV is on most of the time.
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Teenagers who are either  underweight or obese are likely to have fewer children in  adulthood, a study has found.
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Men without children have a  lower risk of prostate cancer compared with fathers, but those  who father a brood of kids appear to have a relatively low risk  also, the results of a large study suggest.
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The study confirms recent estimates, which put the number at roughly one in 160 children â higher than the one-in-200 estimate made in the 1980s.
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Children born to older fathers may have a higher risk of developing schizophrenia ( search ) than those with younger dads, according to a new study.
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A child born of a teenage father is more likely to have problems at birth ranging from pre-term delivery and low birth weight, according to a Canadian study published Thursday.
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The UK's population is growing as more women have babies in their thirties, according to experts.