Thalidomide is a drug known to disrupt limb development. Why might exposure to thalidomide during the first trimester cause more severe birth defects than a similar level of exposure in the third trimester?

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The Answer of Thalidomide is a drug known to disrupt limb development. Why might exposure to thalidomide during the first trimester cause more severe birth defects than a similar level of exposure in the third trimester?

Thalidomide Is a Drug Known to Disrupt Limb Development