title: Use of in-vitro fertilisation embryos cryopreserved for 5 years or more.
abstract: Human embryos cryopreserved after in-vitro fertilisation can be stored initially for 5 years, and the storage period may be extended to a maximum of 10 years. Of 1344 embryos cryopreserved between 1988 and 1994 at two centres in Manchester, 67% (904 embryos) have had to be destroyed at the end of the first 5-year interval, even if the couples involved remain childless.
authors.forename: J O
authors.initials: JO
authors.lastname: Oghoetuoma
authors.forename: C
authors.initials: C
authors.lastname: McKeating
authors.forename: G
authors.initials: G
authors.lastname: Horne
authors.forename: D R
authors.initials: DR
authors.lastname: Brison
authors.forename: B A
authors.initials: BA
authors.lastname: Lieberman
mesh_terms: D015925:Cryopreservation; D019924:Embryo Disposition; D004624:Embryo Transfer; D004739:England; D005260:Female; D005307:Fertilization in Vitro; D033161:Government Regulation; D006801:Humans; D007231:Infant, Newborn; D010352:Patient Dropouts; D011247:Pregnancy; D013997:Time Factors