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  • Title: Teratogenic effects of phenytoin on chick embryos.
    Author: Singh M, Shah GL.
    Journal: Teratology; 1989 Nov; 40(5):453-8. PubMed ID: 2623634.
    Abstract:
    The antiepileptic drug phenytoin was injected into the yolk sac of White Leghorn chick embryos. A dose-response study was followed by a detailed teratological study using a single dose of 3 mg. The surviving embryos were sacrificed on the 19th day of incubation. The embryos showed a generalized decrease in body weight together with a wide range of malformations. The malformations could be roughly divided into limb, craniofacial, abdominal, and ocular defects, as well as deficiencies in growth. Skeletal defects included hypoplasia of digital phalanges and nails and shortened wings.
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