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Florian Goetze: Encouraging Long-Term Data on Egg Cell Storage from the “Golden Eggs” Study
Florian Goetze/LinkedIn
Nov 8, 2026, 14:37

Florian Goetze: Encouraging Long-Term Data on Egg Cell Storage from the “Golden Eggs” Study

Florian Goetze, Medical Director at 360° Fertility Center Zurich, shared on LinkedIn:

“Stored for almost 16 years – and a child from it.

The ‘Golden Eggs’ study provides encouraging long-term data on egg cell storage.

For Switzerland, this raises a pressing question:

Should we destroy egg cells after ten years while politicians prepare to store them longer after social freezing?

From the annual congress of the American Society for Reproductive Medicine – ASRM in Baltimore, six more studies that I found particularly exciting:

  1. Methotrexate: What difference does the distance to the next IVF make for the embryonic euploidy rate according to PGT-A?
  2. Preimplantation genetic diagnosis: How much ‘certainty’ does an inconspicuous PGT-A finding actually offer?
  3. Hormonal IUD: What evidence is there of a connection between earlier use and later mucosal formation?
  4. Medical studies: What worries do future doctors have about their own family planning – and how well do they know the biological realities?
  5. Trigger syringe: Does the choice of trigger make a difference in the proportion of euploid embryos?
  6. Office hysteroscopy after unsuccessful cryotransfer: Often new findings – but also more success?

Back to ‘The Golden Eggs’:

A live birth after 15.8 years of egg cell storage.

And no statistically proven decline in pregnancy success with longer storage periods.

The long-term group is small – this is not proof of identical chances of success.

But an encouraging signal: The reproductive potential of frozen egg cells extends beyond ten years.

Ten years is a legal deadline. No proven biological expiration date.

What does this mean for Switzerland?

The WBK-S has given the green light for the development of a transitional regulation for longer egg cell storage. The Swiss Society of Gynecology and Obstetrics (SGGG)/360° Fertility Center Zurich expressly welcomes this step.

But political approval is not yet a valid extension.

And this is where the explosiveness lies: In September 2027, the ten-year rule will have been in place for ten years.

This does not mean that egg cell deposits will only reach their maximum storage period then. For eggs that used to be stored regularly, the deadlines expire earlier.

The urgency does not begin in 2027. It exists today.

The cantons have to enforce current law while politicians prepare to adapt it. For the women affected, it is not about abstract deadlines, but about their concrete family planning.

What is needed now is a binding transitional solution from Bern that gives all cantons legal certainty and also protects those whose deadline has already expired.

Throughout Switzerland. Legally compliant. On time.”

Stay informed with the latest updates in fertility and reproductive medicine on Fertility News.

egg cell storage Fertility Fertility News Florian Goetze Golden Eggs Hormonal IUD methotrexate OBGYN Preimplantation genetic diagnosis reproductive health Reproductive Medicine SGGG Swiss Society of Gynecology and Obstetrics Switzerland Trigger syringe Women’s Health
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