teratogens

The chemical poisons were well known as the embryonic teratogens .

众所周知，化学毒物是胚胎致畸剂。

During neural tube development , many environmental teratogens may have adverse effects and thus induce neural tube defects ( NTDs ) .

在神经管发育过程中，多种环境致畸因素可对其产生影响，引发神经管畸形（Neuraltubedefects，NTDs）。

Several chemicals are well known teratogens .

有一些化合物已知是致畸物质。

Therefore , it is very crucial for effectively preventing birth defects to screen teratogens and elaborate the mechanism of chemical teratogenicity .

因此，检测化学物的致畸性并阐明其致畸机制已成为有效预防出生缺陷的关键。

Recently , it has been shown that such substances , either by themselves or by virtue of their impurities or reaction products , are teratogens .

最近已经证明，这类物质，或是它们本身，或是它们的不纯物或反应产物，都是致畸形物。

The development and differentiation of neural tube is a very complicated biological process . This process is regulated and affected by various teratogens , and one notable environmental teratogen is fetal exposure to hyperthermia .

神经管的发育和分化是一个非常复杂的生物进化过程，并且受各种致畸因素调节和影响，其中最重要的就是环境致畸中的高温因素。