It seems kids procreated by older parents (aged 35 years or older) have increased risk of Down Syndrome. The effect is most pronounced when both parents are old

It seems kids procreated by older parents (aged 35 years or older) have increased risk of Down Syndrome. The effect is most pronounced when both parents are older than 35 years: https://pubmed.ncbi.nlm.nih.gov/12771769/ https://pubmed.ncbi.nlm.nih.gov/12771769/