Issues and Reviews in Teratology

Why Efforts to Expand the Meaning of "Teratogen" Are Unacceptable Disagreement about nomenclature in teratology is not new. Dissent even about the very fabric of the discipline-what congenital malformations consist of-has often been voiced. Time, instead of resolving such diffi­ culties, has sometimes worsened them. For example, in the past it was agreed that congenital malforma­ tions are abnorma...