title: Steroid concentrations in human myometrial and placental tissues at week 39 of pregnancy.
abstract: Endogenous levels of P, E1, and E2 were determined by radioimmunoassay in human myometrium and placenta at week 39 of pregnancy. In the myometrium, P and estrogens were higher in the inner layer near the placenta than in other zones. Higher E2/P ratios were found in placental sites. A large difference in the E2/P ratios was observed between placenta and corresponding adjacent myometrial area, indicating an easier diffusion of E2 from the site of its production.
mesh_terms: D004958:Estradiol / Q000378:metabolism*; D004970:Estrone / Q000378:metabolism*; D005260:Female; D006801:Humans; D009215:Myometrium / Q000378:metabolism*; D010920:Placenta / Q000378:metabolism*; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D011374:Progesterone / Q000378:metabolism*; D011863:Radioimmunoassay; D014599:Uterus / Q000378:metabolism*
chemical_list: D004970:Estrone; D011374:Progesterone; D004958:Estradiol