title: [Retrospective analysis of the clinical outcomes of repeated IVF/ICSI cycles].
abstract: OBJECTIVE
  To study whether the rates of pregnancy and implantation decline in repeated IVF/ICSI cycles and whether the decline is associated with the availability of embryo cryopreservation.
  
  
  METHODS
  We retrospectively analyzed the pregnancy and implantation rates of 1,033 IVF/ICSI cycles accomplished in our center to determine the association of the clinical outcomes with the availability of embryo cryopreservation.
  
  
  RESULTS
  The rates of pregnancy and implantation declined slightly in the cycles with embryo cryopreservation (43% vs 43%, P > 0.05; 29% vs 24% , P > 0.05), but significantly in the repeated IVF/ICSI cycles without embryo cryopreservation (43% vs 35%, 43% vs 22% , P < 0.05; 29% vs 23% , 29% vs 16% , P < 0.05).
  
  
  CONCLUSIONS
  The rates of pregnancy and implantation remain similar in the following cycles for those with embryo cryopreservation in the first IVF/ICSI cycles, but decline significantly in the repeated IVF/ICSI cycles for those without.
authors.affiliation: Center of Clinical Reproductive Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, China.
authors.forename: Long
authors.initials: L
authors.lastname: Ma
authors.forename: Ling-Bo
authors.initials: LB
authors.lastname: Cai
authors.forename: Zheng-Jie
authors.initials: ZJ
authors.lastname: Yang
authors.forename: Ting
authors.initials: T
authors.lastname: Feng
authors.forename: Jia-Yin
authors.initials: JY
authors.lastname: Liu
mesh_terms: D015925:Cryopreservation; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D011247:Pregnancy; D011256:Pregnancy Outcome; D018873:Pregnancy Rate; D012189:Retrospective Studies; D020554:Sperm Injections, Intracytoplasmic