title: The singleton, term gestation, and live birth rate per cycle initiated: a 1-year experience in in vitro fertilization cycles with native and donated oocytes.
abstract: OBJECTIVE
  To investigate the singleton, term gestation, and live birth rate per cycle initiated in our IVF program during a 1-year period.
  
  
  METHODS
  Retrospective study of all first IVF cycles performed in the year 2002, with or without intracytoplasmic sperm injection (ICSI), with day 2/3 embryo transfer and using native or donated oocytes.
  
  
  METHODS
  Instituto Valenciano de Infetilidad (IVI), Valencia, Spain.
  
  
  METHODS
  Of 3,158 IVF cycles initially considered, 165 were excluded because of embryo freezing, follow-up loss, or embryo reduction. Of the remaining cycles, only 1,836 were first cycles with day 2/3 embryo transfer; of these, native oocytes were employed in 1,095 and donated oocytes in 741.
  
  
  METHODS
  No patient underwent any additional procedure or intervention.
  
  
  METHODS
  The singleton, term gestation, and live birth rate per cycle initiated was used as a primary outcome measure. Results were analyzed according to the origin of the oocytes (native vs. donated) and the woman's age (<37 and > or =37 years old).
  
  
  RESULTS
  The ectopic pregnancy rate was higher in the native oocyte group. The singleton, term gestation, and live birth rate per cycle initiated was similar in native and donated oocyte groups (15.3% vs. 13.4%). In the native oocyte group, patients <37 years old showed a significantly better outcome. The singleton, term gestation, and live birth rate per cycle initiated was 16.7% and 10.8% in younger and older women, respectively.
  
  
  CONCLUSIONS
  The singleton, term gestation, and live birth rate per cycle initiated constitutes an essential parameter for determining the real possibility of a healthy baby for a specific assisted reproduction technology (ART).
authors.affiliation: Department of Infertility and Maternal-Fetal Medicine, Instituto Valenciano de Infertilidad, Valencia, Spain. jbellver@sego.es
authors.forename: José
authors.initials: J
authors.lastname: Bellver
authors.forename: Carmela
authors.initials: C
authors.lastname: Albert
authors.forename: Sérgio R
authors.initials: SR
authors.lastname: Soares
authors.forename: Claudio
authors.initials: C
authors.lastname: Alvarez
authors.forename: Antonio
authors.initials: A
authors.lastname: Pellicer
mesh_terms: D000328:Adult; D001723:Birth Rate / Q000639:trends*; D004624:Embryo Transfer / Q000706:statistics & numerical data / Q000639:trends; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods / Q000706:statistics & numerical data* / Q000639:trends; D005865:Gestational Age; D006801:Humans; D007223:Infant; D018587:Oocyte Donation / Q000379:methods / Q000706:statistics & numerical data* / Q000639:trends; D009865:Oocytes / Q000502:physiology; D011247:Pregnancy; D011272:Pregnancy, Multiple / Q000706:statistics & numerical data; D012189:Retrospective Studies; D020554:Sperm Injections, Intracytoplasmic / Q000379:methods / Q000706:statistics & numerical data / Q000639:trends; D047929:Term Birth