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Waiting until forties before trying to become fathers could reduce male fertility because sperm DNA becomes damaged with age.
Frequent cell division to make new generation of sperm daily increases errors in cell formation as men get older and the risk increases everyday. Genetic errors may get into sperm as men aged.
The cumulative effect of these errors as cell division goes on and on and on affects children produced by older men. Autism, epilepsy and schizophrenia are associated with older sperm.
Older men may not be able to impregnate a woman naturally, it may take a long period of time to archive conception and risk of miscarriage is very high.
Healthy lifestyle can prevent DNA damage and changes to genes. Men must eat healthily diet, avoid smoking, engage in regular physical activities and avoid hot baths, as sperm likes cool temperatures to be in good reproductive shape.
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