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    Patent Pending

    BWH Egg Freezing Counseling Tool (EFCT)

    Predicts likelihood of live birth for elective egg freezing in women.
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    IMPORTANT

    This calculator is not externally validated, and as such, should be used with caution.

    INSTRUCTIONS

    Use in women age 24–44 years undergoing fertility counseling.

    When to Use
    Pearls/Pitfalls
    Why Use

    Patients seeking fertility preservation with elective egg freezing.

    • Uses a woman’s age at egg retrieval and the number of mature eggs frozen to predict the probability of having at least one, two, or three live births.
    • Since limited data exist regarding live births following elective egg freezing, the BWH Egg Freezing Counseling Tool was developed from a surrogate population of presumably fertile women (egg donor, male-factor, and tubal-factor only infertility).
    • No number of frozen eggs can guarantee a live birth.
    • IVF stimulation cycles produce a variable number of eggs, even among women of similar ages. Older women typically obtain fewer eggs per stimulation cycle.
    • May be less reliable for women ≥39 years old.
    • May overestimate live birth rates for women undergoing non-elective egg freezing for medical reasons, such as cancer.
    • Data are retrospective and from a single academic institution in an insurance-mandated state.
    • Individual IVF clinics with different thaw survival and live birth rates may need to modify and customize this model.
    • Has yet to be prospectively validated.
    • Predicts likelihood of having at least one, two, or three live births using only two data points.
    • Incorporates likelihood that an embryo will have normal number of chromosomes.
    • Helps determine whether undergoing additional egg freezing cycles would result in a meaningful increase in likelihood of having a live birth.
    years
    eggs

    Result:

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    Next Steps
    Evidence
    Creator Insights

    Management

    Decisions about egg freezing should be made by the patient in conjunction with her physician, considering patient-specific characteristics.

    Content Contributors
    • Malinda Lee, MD
    About the Creator
    Dr. Randi Goldman
    Are you Dr. Randi Goldman?
    Dr. Janis Fox
    Are you Dr. Janis Fox?
    Content Contributors
    • Malinda Lee, MD