Sirenomelus

Fetus diagnosed as Sirenomelus
"Sirenomelia is characterized by fused legs and feet. The infants resemble the mythical siren. The eyes are amphibian-like and the ears are floppy and low. The urogenital and gastrointestinal systems are badly developed. They suffer from renal agenesis, absence of bladder and urethra, and an imperforate anus. Under the influence of compression in the uterus during the early period of gestation, fusion of the inferior extremities is effected. Sirenomelia is related to caudal repression. These infants usually do not survive for more than 24 hours."