The added value of embryo cryopreservation to cumulative ongoing pregnancy rates per IVF treatment: Is cryopreservation worth the effort?

D. De Jong, M. J.C. Eijkemans, N. G.M. Beckers, R. V. Pruijsten, B. C.J.M. Fauser, N. S. Macklon*

*Corresponding author af dette arbejde

    Publikation: Bidrag til tidsskriftArtikelForskningpeer review

    Abstract

    Purpose: To calculate the added benefit of a cryopreservation program to the cumulative ongoing pregnancy rate over a maximum of three cycles of IVF. Methods: A total of 1251 couples beginning their first IVF treatment between January 1995 and December 1999 were evaluated. Ongoing pregnancies from fresh and subsequent cryopreserved embryo transfer cycles were analyzed. Pregnancies arising from the cryopreservation cycle were considered to augment the cumulative pregnancy rate when no ongoing pregnancy arose from the fresh embryo transfer cycle. Results: The ongoing pregnancy rate per cryopreserved embryo transfer was 11.7%. The cumulative ongoing pregnancy rate following three successive started fresh IVF cycles was 42.5%. When pregnancies arising from the transfer of thawed cryopreserved embryos were included, the cumulative ongoing pregnancy rate increased to 43.8%, rising to 44.8% when extrapolated data from as yet unthawed embryos was included. Conclusions: When analyzed in these terms, the supplementary benefit of cryopreserving supranumerical embryos appears limited.

    OriginalsprogEngelsk
    Sider (fra-til)561-568
    Antal sider8
    TidsskriftJournal of Assisted Reproduction and Genetics
    Vol/bind19
    Udgave nummer12
    DOI
    StatusUdgivet - 1 dec. 2002

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