title: Successful pregnancies from embryos cryopreserved more than ten years: two case reports.
abstract: OBJECTIVE
  To determine the efficacy of using embryos cryopreserved more than ten years in a donor embryo program.
  
  
  METHODS
  Embryos were cryopreserved using a simplified freezing protocol and then donated for anonymous use after the donor had had a successful pregnancy and was sure she did not want to conceive again.
  
  
  RESULTS
  Two women in the donor embryo program transferred embryos that had been cryopreserved longer than ten years. Both patients delivered healthy babies.
  
  
  CONCLUSIONS
  Embryos cryopreserved over ten years can result in successful pregnancies.
authors.affiliation: The University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School at Camden, USA.
authors.forename: C
authors.initials: C
authors.lastname: Wilson
authors.forename: J H
authors.initials: JH
authors.lastname: Check
authors.forename: D
authors.initials: D
authors.lastname: Summers-Chase
authors.forename: K
authors.initials: K
authors.lastname: Swenson
mesh_terms: D000328:Adult; D015925:Cryopreservation; D004624:Embryo Transfer; D004622:Embryo, Mammalian; D005260:Female; D006801:Humans; D050498:Live Birth; D011247:Pregnancy; D013997:Time Factors