New studies are revealing the promising news that first time expectant mothers have less of a body burden of persistent organic chemicals (POPs) than moms did a generation ago. Many of these chemicals were banned in the 1970s. Serum levels of PCBs, for example, dropped considerably. POPs chemicals tend to accumulate in fat and are long lasting in the environment. Examples of POPs include DDT, endrin, dieldrin, aldrin, chlordane, toxaphene, heptachlor, mirex, hexachlorobenzene; and the industrial chemicals and by-products; PCBs, dioxins and furans. Unfortunately, a metabolite of the insectide DDT, which has not been used in the U.S. for around 30 years, was detected in all of the women’s blood.