title: Maternal serum, amniotic fluid and cord leptin levels at term: their correlations with fetal weight.
abstract: OBJECTIVE
  To investigate the relationship between fetal weight and leptin levels in maternal serum, amniotic fluid and umbilical cord.
  
  
  METHODS
  Forty pregnant women presenting for antenatal care at early weeks of gestation were enrolled for the study. Maternal and cord blood samples for leptin measurement were obtained at birth. Amniotic fluid samples were recovered by amniotomy performed during labor. Maternal body mass index and placental weight were also recorded. Leptin measurement was carried out using the ELISA method. Spearman's correlation test was used for comparison of non-parametric data.
  
  
  RESULTS
  Leptin concentration in venous cord blood correlated significantly with birth weight and placental weight whereas maternal serum and amniotic fluid leptin levels did not show correlation with birth weight. There were no significant correlations between leptin levels in maternal serum, cord blood and amniotic fluid.
  
  
  CONCLUSIONS
  We conclude that lack of correlation between leptin levels in mother, cord and amniotic fluid suggest that these compartments may be non-communicating separate units or have different mechanisms regulating leptin synthesis or degradation, and that leptin in maternal blood and amniotic fluid may not have a direct effect on fetal growth but rather a different role in pregnancy.
authors.affiliation: Center for Reproductive Medicine and Infertility, Weill Medical College of Cornell University, New York, NY 10021, USA. ozo2001@med.cornell.edu
authors.forename: Ozgür
authors.initials: O
authors.lastname: Oktem
authors.forename: Nihan
authors.initials: N
authors.lastname: Dedeoğlu
authors.forename: Yüksel
authors.initials: Y
authors.lastname: Oymak
authors.forename: Devrim
authors.initials: D
authors.lastname: Sezen
authors.forename: Leyla
authors.initials: L
authors.lastname: Köksal
authors.forename: Tanju
authors.initials: T
authors.lastname: Pekin
authors.forename: Hüsnü
authors.initials: H
authors.lastname: Gökaslan
authors.forename: Zehra Nese
authors.initials: ZN
authors.lastname: Kavak
mesh_terms: D000328:Adult; D000653:Amniotic Fluid / Q000378:metabolism; D005260:Female; D005312:Fetal Blood / Q000378:metabolism; D020567:Fetal Weight; D006801:Humans; D020738:Leptin / Q000097:blood / Q000378:metabolism*; D011247:Pregnancy / Q000378:metabolism*; D011263:Pregnancy Trimester, Third
chemical_list: D020738:Leptin