title: Triple-test screening in in vitro fertilization pregnancies.
abstract: OBJECTIVE
  To determine whether the results of triple-test analysis differ between spontaneous and IVF pregnancies.
  
  
  METHODS
  The study population consisted of 140 women with singleton pregnancies, 70 by IVF, and 70 by spontaneous conception. The groups were matched for maternal age, gestational week, and laboratory batch. The levels of all triple-test markers--alpha-fetoprotein (AFP), human chorionic gonadotropin (HCG), and unconjugated estriol (u-E3)--were compared between the groups.
  
  
  RESULTS
  Significantly higher HCG levels were detected in the patients with IVF pregnancies than in the control group (1.31 +/- 0.8 vs. 0.95 +/- 0.5 multiple of the medians, respectively, (p < 0.006), but there were no significant differences in AFP or u-E3 levels. Overall, 18.5% of the IVF group were found to be screen-positive as compared with 11.4% of the control group (difference not statistically significant). Only 8 IVF pregnancies (11.4%) reached the lowest calculated risk possible (1:9999) compared with 17 (24.2%) in the control group (p < 0.05).
  
  
  CONCLUSIONS
  Our findings support previous data demonstrating elevated maternal serum HCG in IVF patients in comparison with spontaneous ones.
authors: Department of Obstetrics and Gynecology, Rabin Medical Center, Petah Tiqva, Israel. barhava@ccsg.tau.ac.il
authors: I
authors: I
authors: Bar-Hava
authors: M
authors: M
authors: Yitzhak
authors: H
authors: H
authors: Krissi
authors: M
authors: M
authors: Shohat
authors: J
authors: J
authors: Shalev
authors: B
authors: B
authors: Czitron
authors: Z
authors: Z
authors: Ben-Rafael
authors: R
authors: R
authors: Orvieto
mesh_terms: D016022:Case-Control Studies; D006063:Chorionic Gonadotropin / Q000032:analysis*; D004964:Estriol / Q000032:analysis*; D005260:Female; D005306:Fertilization / Q000502:physiology*; D005307:Fertilization in Vitro; D006801:Humans; D011247:Pregnancy; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D006063:Chorionic Gonadotropin; D000509:alpha-Fetoproteins; D004964:Estriol