[yummyfajitas]

Newspaper article, most likely, I don't remember exactly. However, a quick google search for "low birth weight race" yields:

http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5127a1.htm#tab1

Here is another quirk of the measurement system I just discovered while googling. Low birthweight rates increase with income (at least in Brazil):

http://www3.interscience.wiley.com/journal/118696841/abstrac...