Consider this : while BPA does not accumulate in our bodies, as do many persistent organic pollutants (POPs) such as DDT, it easily enters into all of our cells. This is a cause for concern, because it is a xeno-estrogen, meaning that although it is a foreign estrogen not produced by our bodies, it has estrogenic (hormone-like) properties, and it has been found to disturb every developmental biological system in which it has been tested. in addition, because it acts like an estrogen, very small concentrations can disrupt the developing fetus. For instance, when researches gave pregnant rats oral doses of BPA, the chemical entered the placenta and accumulated in the fetus. In other studies with rodent mothers exposed to BPA, offspring had higher body weight, more breast and prostate cancer, and reduced reproductive function.