Does Estrogen Cross Placenta?

Does Estrogen Cross Placenta? Does estrogen cross placenta? During development, placenta is the primary source of estrogen production but estrogen can only be produced if the fetus or the mother supplies dehydroepiandrosterone (DHEA), the estrogen prohormone. Can hormones pass through the placenta? There is evidence that maternal thyroid hormones can cross the human placenta and