title: The impact of leukemia inhibitory factor in uterine flushing on the reproductive potential of infertile women--a prospective study.
abstract: OBJECTIVE
  To determine the value of leukemia inhibitory factor (LIF) assessment for predicting the reproductive outcome.
  
  
  METHODS
  Two phase study. Phase I: assessment of LIF in uterine flushing. Phase II: 1,5 years after examining the last patient, a questionnaire was sent to all participants of the phase I. Phase I: Uterine flushing and endometrial samples were collected during implantation window from infertile patients with stage I/II endometriosis (n = 14), patients with idiopathic infertility (n = 27), luteal phase deficiency (n = 13), and fertile control (n = 21). LIF was assessed in uterine flushings in all patients by ELISA. In endometrium, semiquantitative RT-PCR was performed for LIF mRNA expression. Phase II: questionnaire has been sent to all infertile women taking part in the first phase of the experiment, regarding their reproductive outcome.
  
  
  RESULTS
  65.4% patients who had returned the questionnaire did get pregnant. LIF concentration at a cut-off point of 2.31 pg/ml had a 95.7% sensitivity and 81.8% specificity in predicting the reproductive outcome.
  
  
  CONCLUSIONS
  This prospective study for the first time in literature indicates that the LIF assessment can be used as a predictor of reproductive success.
authors.affiliation: Division of Reproduction, Department of Obstetrics and Gynecology, University of Medical Sciences, Poznan, Poland.
authors.forename: Mateusz
authors.initials: M
authors.lastname: Mikolajczyk
authors.forename: Przemyslaw
authors.initials: P
authors.lastname: Wirstlein
authors.forename: Jana
authors.initials: J
authors.lastname: Skrzypczak
mesh_terms: D005260:Female; D006801:Humans; D007247:Infertility, Female / Q000378:metabolism*; D053605:Leukemia Inhibitory Factor / Q000378:metabolism*; D011247:Pregnancy; D011446:Prospective Studies; D012333:RNA, Messenger / Q000378:metabolism; D014599:Uterus / Q000378:metabolism*
chemical_list: C507837:LIF protein, human; D053605:Leukemia Inhibitory Factor; D012333:RNA, Messenger