"> DOI:10.18643/gieu.2018.100
"> DOI:10.18643/gieu.2018.100
"/> Cryo-thawed embryo transfer. Artificial versus natural cycle
<- Home <- Arhive <- Vol. 14, Issue 3, September 2018


Cryo-thawed embryo transfer. Artificial versus natural cycle

N. A. Krayem, M. Braila, A. C. Veliscu, M. Cosma, A. Braila

Abstract: There has been a rise in the number of frozen embryo transfers (FET), ever since clinicians started adopting the “freeze-all” policy as a method of prevention for the hyperstimulation syndrome. Even though people have made great advances in this area, the pregnancy rates haven’t changed much, so we constantly need to find new ways to improve in vitro fetilization outcomes. The purpose of our study is to evaluate the existing methods of endometrium preparation before the frozen-thawed embryo transfer: natural cycle (NC)-FET, modified NC- FET, artificial cycle (AC)-FET and AC- FET with gonadotropin releasing hormone (GnRH) agonist. The primary outcome the number of clinical pregnancies and the secondary outcomes were the number of cancellation cycles, implantation rate and live birth rate. The women that underwent NC- FET and AC- FET with pre-administration of GnRH agonist had similar outcomes, but the NC proved to have the best results.

Keywords: frozen embryo transfer, natural cycle, modified natural cycle, artificial cycle, clinical pregnancy rate.

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