title: Twin umbilical cord blood gas values.
abstract: In vaginally delivered births (including a few cases where the mothers were under epidural anesthesia), differences between first and second born twins were compared according to presentation at delivery. Of twins with vertex/vertex presentation in 15 primipara cases and in 14 multipara cases, pO2 levels for the second born were significantly lower (both being p < 0.05) than for the first born. Of twins vertex/non-vertex presentation, the second born in 9 primipara cases showed significantly lower pH, pO2 and HCO3 levels (p < 0.05). Also for multipara twins, the second born had significantly lower pH (p < 0.05) and significantly higher pCO2 (p < 0.05) values. Umbilical cord blood gas value findings indicate unfavourable conditions for second born twins.
authors.affiliation: Department of Obstetrics and Gynecology, Kinki University School of Medicine, Osaka, Japan.
authors.forename: I
authors.initials: I
authors.lastname: Fuchi
authors.forename: K
authors.initials: K
authors.lastname: Noda
mesh_terms: D001639:Bicarbonates / Q000097:blood; D001722:Birth Order; D002245:Carbon Dioxide / Q000097:blood; D005260:Female; D005312:Fetal Blood / Q000378:metabolism*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007231:Infant, Newborn; D007746:Labor Presentation; D010100:Oxygen / Q000097:blood*; D010298:Parity; D011247:Pregnancy; D014427:Twins; D014469:Umbilical Arteries; D014471:Umbilical Veins
chemical_list: D001639:Bicarbonates; D002245:Carbon Dioxide; D010100:Oxygen