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Keywords:

  • Transvaginal sonography;
  • prenatal diagnosis;
  • sirenomelia;
  • mermaid fetus;
  • bilateral renal agenesis

Abstract

Two cases of sirenomelia are described, detected in the 14th and 16th weeks of gestation by transvaginal ultrasonography. A hypothesis for the aetiology of sirenomelia and its associated anomalies is discussed.