It has been noticed and research since before 1950 that there is a male biological clock for the health, mental and physical, of the offspring. The new mutations which accumulate in sperm from its many divisions from precursor cells and exposure to toxins explain much autoimmune disorder, new cancers, non-familial autism and schizophrenia, non-familial Alzheimer's, etc. etc. Please keep writing about the male biological clock. I have collected plenty of information on disorders and sperm studies. http://how-old-is-too-old.blogspot.com/ http://themalebiologicalclock.blogspot.com/ The collections are redundant. http://en.wikipedia.org/wiki/Paternal_age_effect http://www.schizophreniaforum.org/for/curr/Malaspina/default.asp

Thanks for your provacative and interesting blog!