[Early prenatal diagnosis of asymmetric cephalothoracopagus twins].

J Gynecol Obstet Biol Reprod (Paris)

CHD Félix-Guyon, Saint-Denis, La Réunion.

Published: May 1994

The authors report on one case of cephalothoracopagus Janiceps conjoined twins discovered by echography at 18 weeks' gestation. Conjoined twins have been said to occur with a frequency of 1/50,000 to 1/100,000 deliveries. The incidence of the cephalothoracopagus variety is one in three million births or one in 58 conjoined twins. Three different mechanisms that may have played a role in the abnormal development of these twins are discussed. The risk that the condition recurs in a subsequent pregnancy are to be considered negligible.

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