DDT breakdown chemical alters thyroid hormone function in pregnant women
http://www.environmentalhealthnews.org/ehs/newscience/dde-in-early-pregnancy-affects-thyroid-hormones/
http://www.environmentalhealthnews.org/ehs/newscience/dde-in-early-pregnancy-affects-thyroid-hormones/
"Researchers report that a woman's DDE exposure during early pregnancy is associated with altered thyroid hormone levels, a condition that could affect fetal brain development."