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How should the clinical efficiency of oocyte cryopreservation be measured?

Abstract Clinical application of oocyte cryopreservation may be in the context of fertility preservation for women about to undergo cytotoxic therapies or may be as an alternative to embryo cryopreservation in routine assisted reproduction. The clinical efficiency of oocyte cryopreservation will be...

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Published in:Reproductive biomedicine online 2007, Vol.14 (4), p.430-435
Main Authors: Edgar, David H, Gook, Debra A
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Language:English
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description Abstract Clinical application of oocyte cryopreservation may be in the context of fertility preservation for women about to undergo cytotoxic therapies or may be as an alternative to embryo cryopreservation in routine assisted reproduction. The clinical efficiency of oocyte cryopreservation will be a consequence of the cumulative impact of pre-freeze oocyte quality, post-thaw survival and subcellular effects of cryopreservation protocols, which impact on early embryo quality and post-transfer viability, together with the degree of selection which is applied to the available biological material. Any valid assessment must include reference to all the above aspects, particularly when comparing cryopreserved oocytes with non-frozen controls or cryopreserved embryos. Cumulative pregnancy rates from oocyte collections may provide the most relevant index of success. Survival of human oocytes cryopreserved using current methodology is similar to that achieved with early-cleavage-stage embryos. Although evidence suggests that developmental potential may be compromised when current oocyte cryopreservation protocols are applied, there is a paucity of rigorously controlled studies in the literature.
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subjects Adult
clinical efficiency
Cryopreservation - methods
cryosurvival
embryo development
Embryo Implantation
Embryo, Mammalian - metabolism
Female
Fertility
Freezing
human oocyte
Humans
Infertility - therapy
Male
Obstetrics and Gynecology
oocyte cryopreservation
Oocytes - cytology
Oocytes - metabolism
Pregnancy
Pregnancy Outcome
Time Factors
Treatment Outcome
title How should the clinical efficiency of oocyte cryopreservation be measured?
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