Monday, August 17, 2009

Older Paternal Age Seen as Factor in Some Birth Defects - New York Times June 6, 2006

As men get older, their sperm deteriorates, a new study has found, and it is likely that the damaged sperm of older men is a significant factor in certain specific birth defects and in increasing the risk of abnormal pregnancies.Birth rates since 1980 have increased by 40 percent in men 35 to 40 and decreased by 20 percent in men under 30, according to background information about the findings, published yesterday in The Proceedings of the National Academy of Sciences. The rising age of fathers has been associated with reproductive problems including spontaneous abortion and with genetic ...



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