Old man Placenta control.

In fact, our invention by our I mean we mammals one of our big inventions was the placenta.

PJC So when Tyrone tells me that the placenta is an ancient organ, I'm thinking, how do I demonstrate that?

In part, amphibians are good indicators and more sensitive because they don't have protection from contaminants in the water no eggshells, no membranes and no placenta.

And we're working a lot with the stem cells that we published on two years ago, stem cells from the amniotic fluid, and the placenta, which have those properties.

And so when you realize that chemicals can pass the placenta and go into your unborn child, it made me start to think, what would my fetus say to me?

Except in a few special circumstances In women, blood vessels grow every month to build the lining of the uterus during pregnancy, they form the placenta, which connects mom and baby.

But it turns out that this ancient structure that separates us from other animals, the placenta, cannot evolve or adapt fast enough because of the rate that we're generating new chemicals that it's never seen before.

And this is not just philosophical, it's already known, that chemicals like diethylstilbestrol and estrogen, PCBs, DDT cross the placenta and effectively determine the likelihood of developing breast cancer and obesity and diabetes already when the baby's in the womb.