Outcome of immature oocytes collection of 119 cancer patients during ovarian tissue harvesting for fertility preservation

  • Alon Kedem
  • Gil M. Yerushalmi
  • Masha Brengauz
  • Hila Raanani
  • Raoul Orvieto
  • Ariel Hourvitz
  • Dror Meirow
Fertility Preservation



Few clinical options for fertility preservation are available to females with cancer, and data about clinical outcomes is limited. Potential supplementary approaches to fertility preservation include retrieval of immature oocytes followed by in vitro maturation (IVM) and storage. The aim of this study was to evaluate post-thawing outcomes of immature oocytes collected both by transvaginal aspiration and from excised ovarian tissue.


We conducted a retrospective cohort study of patients treated in a single tertiary center. We reviewed the records of 119 cancer patients who underwent ovarian tissue cryopreservation and immature oocyte harvesting for fertility preservation. All embryos and oocytes that were frozen and thawed were included in the study. Post-thawing outcomes were evaluated.


Thirty-five stored embryos from eight patients were thawed. Twenty-nine embryos survived (82% survival rate) and were transferred. Six oocytes were thawed, two oocytes survived, and no oocytes were fertilized. Only one PCOS patient became pregnant, resulting in the normal delivery of a healthy baby.


Although a relatively high number of mature oocytes and embryos can be stored with the combined procedure, the limited rate of pregnancies represents a poor reproductive outcome. Therefore, this approach should be reserved for special groups with limited options.


Fertility preservation Oocyte retrieval In vitro oocyte maturation 


Availability of data and materials

The datasets used and/or analyzed during the current study available from the corresponding author on reasonable request.

Ethics approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study, formal consent is not required.

Conflict of interest

The authors declare that they have no competing interests.


No external funding was received for this study.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Alon Kedem
    • 1
  • Gil M. Yerushalmi
    • 1
  • Masha Brengauz
    • 1
  • Hila Raanani
    • 1
  • Raoul Orvieto
    • 1
  • Ariel Hourvitz
    • 1
  • Dror Meirow
    • 1
  1. 1.IVF Unit, Department of Obstetrics and Gynecology, Chaim Sheba Medical Center, Tel-Hashomer, and Sackler School of MedicineTel Aviv UniversityTel AvivIsrael

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