title: [Concepts of placental hormonology].
abstract: During pregnancy, different protein (hCG and hPL) and steroid (progesterone, oestradiol, oestrone, oestriol) hormones are secreted. hCG, measured by RIA in maternal serum, is a first-trimester trophoblastic function test. The serum levels of hPL reveal the placental function during the two last trimesters of gestation. The main steroid hormones, produced by the foeto-placental unit, are progesterone, oestradiol and oestrone, which control placental function, and oestriol, a good index of foetal vitality.
mesh_terms: D005260:Female; D005333:Fetus / Q000378:metabolism; D012739:Gonadal Steroid Hormones / Q000096:biosynthesis; D006801:Humans; D010920:Placenta / Q000378:metabolism; D010926:Placental Hormones / Q000378:metabolism* / Q000502:physiology; D011247:Pregnancy
chemical_list: D012739:Gonadal Steroid Hormones; D010926:Placental Hormones
vernacular_title: Notions d'hormonologie placentaire.