Environmental Working Group, July 14, 2005
Summary. In the month leading up to a baby's birth, the umbilical cord pulses with the equivalent of at least 300 quarts of
blood each day, pumped back and forth from the nutrient- and oxygen-rich
placenta to the rapidly growing child cradled in a sac of amniotic
fluid. This cord is a lifeline between mother and baby, bearing
nutrients that sustain life and propel growth.
Not long ago scientists thought that the placenta shielded cord blood — and the developing baby — from most chemicals and pollutants in the
environment. But now we know that at this critical time when organs,
vessels, membranes and systems are knit together from single cells to
finished form in a span of weeks, the umbilical cord carries not only
the building blocks of life, but also a steady stream of industrial
chemicals, pollutants and pesticides that cross the placenta as readily
as residues from cigarettes and alcohol. This is the human "body
burden" — the pollution in people that permeates everyone in the world,
including babies in the womb.
In a study spearheaded by the Environmental Working Group (EWG) in collaboration with Commonweal, researchers at two major laboratories
found an average of 200 industrial chemicals and pollutants in umbilical
cord blood from 10 babies born in August and September of 2004 in U.S.
hospitals. Tests revealed a total of 287 chemicals in the group. The
umbilical cord blood of these 10 children, collected by Red Cross after
the cord was cut, harbored pesticides, consumer product ingredients, and
wastes from burning coal, gasoline, and garbage.
This study represents the first reported cord blood tests for 261 of the targeted chemicals and the first reported detections in cord blood
for 209 compounds. Among them are eight perfluorochemicals used as
stain and oil repellants in fast food packaging, clothes and textiles —
including the Teflon chemical PFOA, recently characterized as a likely
human carcinogen by the EPA's Science Advisory Board — dozens of widely
used brominated flame retardants and their toxic by-products; and
numerous pesticides.
Of the 287 chemicals we detected in umbilical cord blood, we know that 180 cause cancer in humans or animals, 217 are toxic to the brain
and nervous system, and 208 cause birth defects or abnormal development
in animal tests. The dangers of pre- or post-natal exposure to this
complex mixture of carcinogens, developmental toxins and neurotoxins
have never been studied.
Source: Chemical analyses of 10 umbilical cord blood samples were conducted by AXYS Analytical Services (Sydney, BC) and Flett Research Ltd. (Winnipeg, MB).
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