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Embryotoxin

/ˌɛm.bri.oʊˈtɑk.sɪn/noun
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An embryotoxin is a substance that specifically harms or disrupts the development of an embryo, often leading to birth defects, miscarriage, or altered growth. In today's world, it's a key concern in toxicology and environmental health, where scientists evaluate potential risks from chemicals in everyday products like pesticides and drugs to protect vulnerable populations during pregnancy.

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The 1950s drug Thalidomide, initially hailed as a safe sedative for pregnant women, was later identified as a devastating embryotoxin that caused over 10,000 birth defects globally, including limb deformities, and spurred the creation of stricter drug safety regulations like the Kefauver-Harris Amendment in 1962. This incident not only transformed pharmaceutical testing but also revealed how a single substance can profoundly alter embryonic development in ways that were previously unimaginable.

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Merriam-Webster DictionaryOxford English DictionaryToxipedia

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