"In the final analysis, the notion of the 'crack baby' is a myth. So-called 'cocaine babies' and 'crack babies' are more likely suffering from their mothers’ multiple drug use (particularly alcohol), and/or are 'poverty babies' suffering from a lack of medical care and poor nutrition."
Source
Inciardi, James A., "The Irrational Politics of American Drug Policy: Implications for Criminal Law and the Management of Drug-Involved Offenders," Ohio State Journal of Criminal Law (Columbus, OH: Moritz College of Law, The Ohio State University, Fall 2003) Volume 1, Issue 1, p. 278.