June 27th, 2011 by admin

As a lifelong advocate for women’s health, scholar and author D. Lindsey Berkson has been investigating the effects of hormone disrupters on the fetus.She writes, “During critical times such as pregnancy, a mother’s body has high levels of estrogen. Fortunately 99 percent of the estrogen a pregnant woman makes is attached to sex hormone-binding globulin (SHBG). When estrogen rides i piggyback on these blood proteins, it is said to be bound. Estrogen that is bound does not cross the placental barrier, so the estrogen cannot enter the body and brain of the developing child. The estrogen that is not bound is referred to as free estrogen as it is able to pass freely into cells and bind with receptors.Free estrogen is thus the biologically active estrogen that can get into a cell and send a signal to start estrogenic activity. Only 0.2 or 0.3 percent of a mother’s estrogen is free and can get into the fetus.*7/165/1*

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