(1) Natural estrogen can also easily be divided into the three types of estrogen: estradiol, estrone, and estriol .(2) Fetal cortisol and estriol were measured in the umbilical vein plasma at delivery.(3) I assume that you're taking an oral dose of estriol or some combination of estriol , estrone, and estradiol.(4) The primary estrogen secreted by the ovary is estradiol, whereas that of the placenta is estriol .(5) Even though the ovaries cease producing estradiol, estriol continues to be made by the adrenal glands and in fat cells.
