title: [Statistical correlation between a transference test and embryonic transference in an assisted reproduction program].
abstract: OBJECTIVE
  Determining if a statistical correlation can be established between those variables observed during the transference test performed before ovarian stimulation and those obtained during the real embryo transference.
  
  
  METHODS
  Clinical retrospective.
  
  
  METHODS
  Ninety four female patients included in the IVF-ET were studied and a transference test previous to ovarian stimulation was performed. The following parameters were considered in this test: hysterometry, type of catheter, degree of difficulty, and person performing it. A total of 117 embryonic transferences were carried out, and the same parameters observed during the test were measured. The chi square test was used for the statistical analysis.
  
  
  RESULTS
  The most commonly used kind of catheter was the Cook Soft Pass (n = 92), and a statistically significant correlation was observed with the one used during the real transference (n = 94). Concerning the degree of difficulty, the transference test resulted complicated in 4.2% of the cases, difficult in 31.6% of them, and easy in 64.2% of them, presenting a statistical correlation with the real transference, where the procedure resulted complicated in 1.7% of the patients, difficult in 32.4% of them, and easy in 65.8%. In addition, and with the intention of ruling out the medical factor, we tried to have the same person performing the transference test and the real procedure, and a statistically significant correlation was also observed. Pregnancy rate per transference was 27.4%. When an association between the difficulty of a real transference and pregnancy rates was tried, no statistical association between an easy or a difficult transference was observed.
  
  
  CONCLUSIONS
  Embrionic transference is a fundamental phase for IVF-ET programs. However, a variety of factors can influence this procedure, some are medical and others are mechanical. Our results allow us to conclude that there is a statistical correlation between those variables observed during the real embryonic transference and the test, so the latter can be considered as a very useful element in the integral in vitro fertilization process, which prevents the real transference from becoming a blind procedure.
authors.affiliation: Centro Especializado para la Atención de la Mujer, Unidad de Reproducción Asistida, Hospital Angeles de las Lomas.
authors.forename: Alberto
authors.initials: A
authors.lastname: Kably Ambe
authors.forename: Julián
authors.initials: J
authors.lastname: Ruíz Anguas
authors.forename: Andrea Baptista
authors.initials: AB
authors.lastname: Pérez-Avellá
authors.forename: Esperanza
authors.initials: E
authors.lastname: Carballo Mondragón
authors.forename: Samuel
authors.initials: S
authors.lastname: Karchmer Krivitzky
mesh_terms: D000328:Adult; D004624:Embryo Transfer / Q000706:statistics & numerical data*; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods* / Q000706:statistics & numerical data*; D006801:Humans; D008875:Middle Aged; D011247:Pregnancy; D018873:Pregnancy Rate; D012189:Retrospective Studies; D016896:Treatment Outcome
vernacular_title: Correlación estadística entre una prueba de transferencia y la transferencia embrionaria en un programa de reproducción asistida: análisis de los resultados.