Breast milk is the purest and best possible food for the new-born infant...few weeks ago In context with the COP 18 and environmental issues I read an article about a place ( I am forgetting the name) where a large population of women had high mercury level in their milk....which could be more hazardous for some kids... Do you think is it necessary to do some medical check ups??? http://www.nytimes.com/2007/07/24/nyregion/24mercury.html?_r=0