title: Twin delivery following 12 years of human embryo cryopreservation: case report.
abstract: It is uncertain how long IVF units can keep frozen embryos. Few data exist on success of embryo transfer for embryos that have been cryopreserved for many years. We report the delivery of healthy twins following the transfer of embryos cryopreserved for 12 years. To the best of our knowledge, this is the longest reported successful human embryo freezing.
authors.affiliation: In Vitro Fertilization Unit, Department of Obstetrics and Gynecology, Hadassah University Hospital, Ein Kerem, PO Box 12000, Jerusalem 91120, Israel. Revel@md.huji.ac.il
authors.forename: A
authors.initials: A
authors.lastname: Revel
authors.forename: A
authors.initials: A
authors.lastname: Safran
authors.forename: N
authors.initials: N
authors.lastname: Laufer
authors.forename: A
authors.initials: A
authors.lastname: Lewin
authors.forename: B E
authors.initials: BE
authors.lastname: Reubinov
authors.forename: A
authors.initials: A
authors.lastname: Simon
mesh_terms: D000328:Adult; D015925:Cryopreservation; D004624:Embryo Transfer; D004622:Embryo, Mammalian / Q000502:physiology*; D005260:Female; D005307:Fertilization in Vitro; D005313:Fetal Death; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D011256:Pregnancy Outcome; D013997:Time Factors; D014427:Twins