title: Oxygen measurements in endometrial and trophoblastic tissues during early pregnancy.
abstract: Placental and endometrial partial pressures of oxygen (PO2) were measured using a polarographic oxygen electrode during the first trimester of pregnancy. Between 8-10 weeks' gestation, placental PO2 levels were significantly lower (P less than .001) than endometrial levels. A significant (P less than .001) increase was observed for placental PO2 values measured at 12-13 weeks compared with those obtained at 8-10 weeks. We suggest that the increase of placental PO2 at the end of the first trimester is related to the establishment of continuous maternal blood flow in the intervillous space.
authors.affiliation: Department of Obstetrics and Gynecology, University Hospital Erasme, Brussels, Belgium.
authors.forename: F
authors.initials: F
authors.lastname: Rodesch
authors.forename: P
authors.initials: P
authors.lastname: Simon
authors.forename: C
authors.initials: C
authors.lastname: Donner
authors.forename: E
authors.initials: E
authors.lastname: Jauniaux
mesh_terms: D004717:Endometrium / Q000378:metabolism*; D005260:Female; D006801:Humans; D010100:Oxygen / Q000378:metabolism*; D010313:Partial Pressure; D010920:Placenta / Q000378:metabolism; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D014327:Trophoblasts / Q000378:metabolism*
chemical_list: D010100:Oxygen