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  • Title: Progression of exencephaly to anencephaly in the human fetus--an ultrasound perspective.
    Author: Wilkins-Haug L, Freedman W.
    Journal: Prenat Diagn; 1991 Apr; 11(4):227-33. PubMed ID: 1896409.
    Abstract:
    Exencephaly as a precursor of anencephaly is well delineated in animal studies. In humans, a similar though unproven embryologic sequence is postulated. In the case reported, serial ultrasound studies allowed us to identify a 16-week human exencephalic fetus and observe the cephalic changes during its progression to a classic anencephalic appearance.
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