In Vitro Maturation of Oocytes within Assisted Reproduction [Internet].

Background Conventional in vitro fertilization treatment requires hormone ovarian stimulation to increase the numbers of mature oocytes retrieved. In in vitro maturation, immature oocytes are instead retrieved from unstimulated ovaries and matured in a laboratorium for 30 hours, before fertilisation. Approximately 400 children have been delivered following in vitro maturation. In Norway in vitro maturation of oocytes was granted conditional approval for the period 2004-2008. Norwegian authorities will in 2007 assess whether in vitro maturation of oocytes as a method within assisted reproduction will be permitted in Norway also in the future.

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