Egg freezing
Protocol — what the guideline says
ESHRE (2026) addresses elective oocyte cryopreservation directly:
Stimulation can be started irrespective of the menstrual cycle phase — a conditional recommendation. This removes the historical wait for a particular cycle day.
GnRH antagonist or progestin protocols are probably recommended over GnRH agonist protocols for pituitary suppression.
For final oocyte maturation, a GnRH agonist is preferred — a good practice point.
For fertility preservation before gonadotoxic treatment, the recommendations are stronger: start irrespective of cycle phase (strong), antagonist protocol (strong), and where the disease is oestrogen-sensitive, concomitant letrozole or tamoxifen can be considered. Double stimulation can be considered where the interval before treatment is very short.
The number that matters is eggs, not age at freezing
The chance of a live birth later depends principally on how many mature eggs are stored, and on your age at the time of freezing — because that determines how many of those eggs are chromosomally normal.
Ask your clinic for your predicted yield per cycle based on your AMH or AFC, and how many cycles that implies for the number of eggs you want to store. ESHRE recommends AFC or AMH for predicting response.
Note the distinction: AMH predicts yield. It does not predict live birth.
The honest trade-off on timing
Freezing earlier produces more usable eggs per cycle. But most women who freeze eggs never return to use them — so freezing very early means many women undergo stimulation they will not need.
There is no guideline-specified optimal age. Anyone who gives you a single number is offering an opinion, not a recommendation.
What should be counselled
- Expected yield at your AMH or AFC, and how many cycles that implies
- That stored egg number, not age at freezing, determines the chance of a live birth
- That freezing is not a guarantee
- That your age when you return to use them matters for the pregnancy itself
- Total cost across multiple cycles, plus storage duration and cost
Risks
The stimulation and retrieval risks are those of any IVF cycle, principally OHSS. Where OHSS risk is high, a GnRH agonist trigger substantially reduces it — and since there is no fresh transfer in an egg freezing cycle, that approach is straightforward here.
A practical point often missed
Ask what happens to your eggs if you move city or country, if the clinic closes, or if you stop paying storage fees. Get the answer in writing before you start.
Frequently Asked Questions
At what age should I freeze my eggs?▾
The optimal age for egg freezing is 28–33 years when egg quality and quantity are highest and the number of eggs retrieved per cycle is typically sufficient. After 35, egg quality begins to decline more noticeably. After 38–39, more collection cycles are often needed. An AMH test gives you a personalised assessment of your current ovarian reserve to guide timing.
How long can frozen eggs be stored?▾
In India, the ICMR ART Act 2021 allows storage for up to 10 years (extendable). In the UK and US, frozen eggs can be stored for up to 55 years under certain conditions. Properly vitrified eggs do not degrade in storage — time in liquid nitrogen does not reduce egg quality.
Is egg freezing painful?▾
The daily injections are mildly uncomfortable. Ovarian stimulation can cause bloating and discomfort as the ovaries enlarge. Egg retrieval is performed under sedation and most patients experience period-like cramping for 1–2 days after. The process is generally well-tolerated with appropriate pain management.
How many eggs should I freeze?▾
Under 35: aim for 8–10 mature eggs per intended pregnancy, which gives approximately a 60–70% cumulative live birth rate. Over 35: 12–15 eggs recommended. Over 38: may need 15–20+ eggs or multiple collection cycles. Your specialist will advise based on your AMH, AFC, and stimulation response.