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Sperm and birth defects

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    Skip to: Main Navigation Main Content. There's been a theory that sperm or eggs which have been hanging around for a day or two before fertilisation have a higher risk of producing a baby with either Down's Syndrome or a birth defect. But a recent study has found no evidence to support the theory. How on earth, you might say, do you get into such a situation?
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    Healthy sperm

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    'Stale sperm' and birth defects - Health & Wellbeing

    AFTER three decades of efforts to discover how a pregnant woman's environment can affect the health of her fetus, researchers are turning their attention to fathers. The new research, much of it in early stages, suggests that certain substances can cause genetic mutations or other alterations in sperm that lead to permanent defects in children. These include familiar birth defects like heart abnormalities and mental retardation as well as less familiar ones like childhood cancer and learning disorders. The new findings may force health authorities and occupational safety experts to rethink or expand regulations intended to prevent birth defects that have limited women, but not men, from jobs considered hazardous to the fetus.
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    How Men’s Sperm Can Affect Pregnancy

    But there is a lot you can do before that, to increase the chance of having a healthy pregnancy and a healthy baby, when the time is right. It can also affect his sex drive libido. Testes need to be a few degrees cooler than the rest of the body to make good quality sperm. If it gets too hot around the testes, they can have problems making sperm.
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    Back to Genetics and stem cells. But this is an opinion piece. We don't know how the researchers selected the evidence they reviewed, and it is possible that not all relevant research was considered.
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