孩子有自閉症的問題，40歲以上產婦，與25-29年齡段產婦相比，風險

孩子有自閉症的問題，40歲以上產婦，與25-29年齡段產婦相比，風險增加51%；與25歲以下產婦相比，風險增加77%。據此換算，如果40歲以上產婦孩子有自閉症的風險為100，那麽：

產婦年齡段      相對風險

<25                   56.5

25-29                66.2

>40                  100

另外，有文獻指出，高齡產婦生下的女孩，偏男性化。

信息來源：

Study Confirms Link between Older Maternal Age and Autism，Maternal age and autism are both on the rise--but only a small fraction of the increasing incidence can be explained by the trend toward later childbearing

https://www.scientificamerican.com/article/autism-maternal-age/

The researchers found that mothers over 40 had a 51 percent higher risk of having a child with autism than mothers 25 to 29, and a 77 percent higher risk than mothers under 25. Autism—a developmental disorder characterized by impaired social interaction and communication—appears to be on the rise.