In-utero exposures

In this photo illustration a pregnant woman is seen holding a cigarette on July 18, 2005 in <a class="taxInlineTagLink" id="PLGEO00000021201" title="England" href="/topic/international/britain/england-PLGEO00000021201.topic">London</a>, England. Researchers at the University of California say that children exposed in the womb to maternal smoking showed changes in the genes that play a role in human <a class="taxInlineTagLink" id="HEDAI0000010" title="Cancer" href="/topic/health/diseases-illnesses/cancer-HEDAI0000010.topic">cancers</a> and immune response.
ct-julie-blog-in-utero-exposure-photo

( Photo illustration by Daniel Berehulak/Getty Images )

In this photo illustration a pregnant woman is seen holding a cigarette on July 18, 2005 in London, England. Researchers at the University of California say that children exposed in the womb to maternal smoking showed changes in the genes that play a role in human cancers and immune response.

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