Warfarin therapy initiated during pregnancy and phenotypic chondrodysplasia punctata.

An infant is described who has clinical manifestations and roentgenographic features consistent with the diagnosis of chondrodysplasia punctata. The mother of this infant received warfarin during pregnancy. Eight cases demonstrating an association between warfarin therapy during pregnancy and chondrodysplasia punctata in the child have been reported; in the present case therapy was initiated following conception (see following case report). Warfarin may be teratogenic, producing a phencopy of the heritable forms of chondrodysplasia punctata. Because of the evident association we suggest (1) warfarin is contraindicated in pregnancy and alternative anticoagulants should be used; (2) products of at-risk pregnancies should be screened for the characteristic radiologic findings; and (3) preconceptual counselling and antenatal diagnosis of the disease may be beneficial.