title: The role of CPK isoenzymes in predicting extrauterine early pregnancy.
abstract: OBJECTIVE
  To evaluate the ability of Creatine phosphokinase (CPK) levels and CPK-MB proportion to differentiate between extra and intrauterine of very early gestations with unknown location.
  
  
  METHODS
  The study is case-control. CPK levels and CPK-MB proportion in 51 women with extrauterine pregnancies were compared to those in 28 women with early intrauterine pregnancies.
  
  
  RESULTS
  No significant difference was found between women with extrauterine pregnancies and early intrauterine pregnancies in the levels of CPK (80.9 ± 62.1 vs. 74.9 ± 51.5; p = 0.66) and CPK-MB proportion (16.2 ± 10.1% vs. 15.1 ± 11.1%; p = 0.86).
  
  
  CONCLUSIONS
  CPK and CPK-MB proportion determinations do not contribute to the clinical differentiation between early intra and extrauterine pregnancies.
authors.affiliation: Department of Obstetrics and Gynecology, Barzilai Medical Center, Ben Gurion University of the Negev, Ashkelon, Israel.
authors.forename: Jenya
authors.initials: J
authors.lastname: Kruchkovich
authors.forename: Raoul
authors.initials: R
authors.lastname: Orvieto
authors.forename: Shlomo
authors.initials: S
authors.lastname: Fytlovich
authors.forename: Ofer
authors.initials: O
authors.lastname: Lavie
authors.forename: Eyal Y
authors.initials: EY
authors.lastname: Anteby
authors.forename: Ofer
authors.initials: O
authors.lastname: Gemer
mesh_terms: D000328:Adult; D015415:Biomarkers / Q000097:blood; D016022:Case-Control Studies; D003402:Creatine Kinase / Q000097:blood*; D052279:Creatine Kinase, MB Form / Q000097:blood*; D003937:Diagnosis, Differential; D005260:Female; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy / Q000097:blood*; D011261:Pregnancy Trimester, First / Q000097:blood*; D011271:Pregnancy, Ectopic / Q000175:diagnosis / Q000201:enzymology*; D055815:Young Adult
chemical_list: D015415:Biomarkers; D003402:Creatine Kinase; D052279:Creatine Kinase, MB Form