Effectiveness of different protocols for slow freezing of human blastocysts

  • Borut Kovačič
  • Nina Hojnik
  • Veljko Vlaisavljević

Abstract

Background: Pregnancy rate after the transfer of frozen / thawed human blastocysts has been lower in comparison with the pregnancy rate in in vitro fertilization (IVF) cycles with fresh embryos. There is a need for the optimization of freezing protocols. Conclusions: All freezing protocols using a simple freezing medium were more effective than protocol with a complex medium. Their application in IVF patients with frozen surplus blastocysts (these patients delivered in fresh cycles in 51.4 %) increases the cumulative delivery rate by an additional 15.2 % with every thawing cycle. The morphology of blastocysts and cycle preparation for transfer had the strongest influence on the success of freezing programme.

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Published
2011-05-01
How to Cite
1.
Kovačič B, Hojnik N, Vlaisavljević V. Effectiveness of different protocols for slow freezing of human blastocysts. ZdravVestn [Internet]. 1May2011 [cited 22Nov.2019];80(SUPPL). Available from: https://vestnik.szd.si/index.php/ZdravVest/article/view/143
Section
Original article

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