The key distinction for policy purposes is that whereas heredity is immutable, congenital characteristics are mediated by the prenatal environment.

与政策目的主要不同的是，尽管遗传是不可改变的，但是出生前的环境却能相对的弥补天生的性状。

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"The 1918 influenza pandemic provides an exceptional opportunity to evaluate effects of prenatal environment using U. S. census data, " writes Almond.

1918年的流感为使用人口普查数据来评估出生前的环境对以后的影响提供了一个很好的特例。

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During early childhood (from the prenatal period to eight years of age), children undergo rapid growth that is highly influenced by their environment.

在幼儿期(即从产前期至8岁)，儿童迅速发育，并深受环境影响。

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"That suggests there was something about their shared prenatal environment that really increases the risk, " says Clara Lajonchere, vice president of clinical programs for Autism Speaks, a nonprofit science and advocacy group.

WSJ: Why Kids Get Autism: New Genetic Clues

In addition, as far as the prenatal environment per hormonal influences, there is some evidence that sexual, physical or verbal abuse could be factors rising to the level of stress that might alter the hormonal prenatal environment, leading to problems in neurodevelopment.

FORBES: Abuse Of Mom In Childhood And Autism Risk