title: Predictors of AVP and TSH levels and the timing of first voiding in the newborn.
abstract: To evaluate obstetric predictors of umbilical cord plasma AVP levels, serum TSH levels and the timing of first voiding, 87 singleton term newborns were divided into three groups: group A, vaginal delivery (n = 30); group B, cesarean section (CS) during labor (n = 26); and group C, elective CS (n = 31). The AVP concentration was 120 (0.7-2170) ng/L in group A, 1.8 (0.01-183) ng/L in group B, and 0.8 (0.01-30) ng/L in group C (p < 0.001). In group A, the TSH concentration was 10.20 (3.5-30.80) mU/L; in group B, 5.40 (2.10-43.00) mU/L; and in group C, 5.30 (2.90-11.00) mU/L (p = 0.001). Duration of labor had a positive correlation with AVP (p < 0.001) and TSH (p = 0.001) concentrations. The timing of first voiding had a positive correlation with gestational age (p = 0.003), volume of additional feeding before first voiding (p < 0.001), and umbilical AVP concentration (p = 0.023). The AVP and TSH concentrations are associated with mode of delivery and duration of labor and AVP levels also with the timing of first voiding in the newborn.
authors.affiliation: Paediatric Research Centre, University of Tampere and Tampere University Hospital, FIN 33014 Tampere, Finland.
authors.forename: Tuomo
authors.initials: T
authors.lastname: Vuohelainen
authors.forename: Riitta
authors.initials: R
authors.lastname: Ojala
authors.forename: Anita
authors.initials: A
authors.lastname: Virtanen
authors.forename: Jari
authors.initials: J
authors.lastname: Laatta
authors.forename: Pertti
authors.initials: P
authors.lastname: Mörsky
authors.forename: Jukka
authors.initials: J
authors.lastname: Uotila
authors.forename: Outi
authors.initials: O
authors.lastname: Tammela
mesh_terms: D001127:Arginine Vasopressin / Q000097:blood*; D036861:Delivery, Obstetric; D005260:Female; D005312:Fetal Blood / Q000737:chemistry*; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D007743:Labor, Obstetric; D011247:Pregnancy; D013223:Statistics as Topic; D013972:Thyrotropin / Q000097:blood*; D014554:Urination
chemical_list: D001127:Arginine Vasopressin; D013972:Thyrotropin