BBC News: Doctors hail 'mermaid' operation: Doctors in Peru say they have successfully operated to separate a one-year-old girl's fused legs.
Indian Pediatrics: Infantogram of a baby with Sirenomelia.
International Sirenomelia Study: A research project to collect DNA samples to research the condition. Downloadable clinical sheet for those who wish to participate in the study. [English/French]
Peru 'Mermaid' Has Oxygen Therapy, Doing 'Great': A Peruvian baby dubbed the "Little Mermaid" because of a rare birth defect in which her legs are fused, is making good progress after initial surgery to prepare her legs for separation, her doctor said on Monday.
Sirenomelia: Wikipedia article.
The Fetus Net: An article by Sandra R Silva, MD and Philippe Jeanty, MD, PhD
The Internet Pathology Laboratory: Page contains two links to photographs of the condition.