Toxicants in Pregnant Women

This article is about how doctors are seeing an increase of toxicants in pregnant mothers that are then being passed on to their babies. Doctors and researchers are trying to figure out why this is happening. The writer doesn't seem to have a bias since they don't really explain why they think this is happening, and they seem to state facts mostly. I see this as a credible source because CNN is a very well known and credible news source.

http://www.cnn.com/2010/HEALTH/06/01/backpack.cord.blood/index.html