The offspring and offspring of the offspring suffer from the Ticking of the Male Biological Clock

Harry Fisch said as far as the connection between older paternal age and devastating genetic disorders, where you look you find it! The main predictor for non-familial autism is PATERNAL AGE.

Dolores Malaspina has studied paternal age and genetic neurocognitive disorders extensively and does not state this lightly:

Though more research is needed, Malaspina says it’s possible that — just like women — the prime time for becoming a dad is one's 20s and early 30s.
“Men," she says, "your biological clocks are ticking, too.”

If you want healthy children and grandchildren plan to have children earlier in life rather than after your very early 30s.

Sperm donors are limited to men under 35 or under 30 in cryobanks that know about the gene DNA deterioration in older men.

Read on if you want to know more about the Male Biological Clock Advancing Paternal Age and Genetic Disorders