唐氏综合征的分布情况。

J Ment Defic Res. 1982 Dec;26 (Pt 4):215-27. doi: 10.1111/j.1365-2788.1982.tb00148.x.

A recent increase in the incidence of Down's syndrome has been found, mainly affecting young mothers. It is concluded that this increase is due to the environment, and an association with the contraceptive pill is sought. The cause of non-disjunction is discussed and the probability of prevention suggested.

人们发现唐氏综合征的发病率最近有所上升，主要影响年轻母亲。研究得出结论，这种上升是由环境因素导致的，并探寻了其与避孕药的关联。文中讨论了染色体不分离的原因，并提出了预防的可能性。