By Dr Manjunath CS, Fertility Specialist, Birla Fertility & IVF, Bengaluru
Egg freezing, also known as oocyte cryopreservation, is a process by which your eggs are removed from the ovaries, frozen, and stored for your future use. A typical egg freezing cycle is 10-14 days and involves a process called ovarian stimulation, where hormonal medication is used to stimulate the ovaries to produce multiple eggs. Once the eggs have matured, they are retrieved through a minor surgical procedure.
It is understandable to wonder whether the medicines used during the process could affect your fertility later, whether repeated cycles could harm the ovaries, or whether frozen eggs could develop problems during storage. These concerns are common, but the evidence available today is largely reassuring.
Does egg freezing reduce your egg reserve?
Not in the way many people assume. During an egg-freezing cycle, medicines help the ovaries mature multiple eggs that have already been recruited for that menstrual cycle. The eggs that are collected are then frozen; the process does not remove the eggs that remain in the ovaries.
This means that freezing your eggs does not prevent you from trying to conceive naturally later. Your chances of natural conception in the future will still depend on factors such as age, ovarian reserve and other aspects of reproductive health.
What about the eggs once they are frozen?
Modern egg freezing usually uses a technique called vitrification, which rapidly freezes the eggs to minimise the formation of ice crystals. Studies so far have found this to be a safe and established method, with reassuring outcomes for pregnancies and babies born using vitrified eggs.
For someone considering egg freezing, the key points are:
- Frozen eggs do not mean your ovaries have been “emptied”
- Egg freezing does not stop you from trying to conceive naturally later
- Vitrification has a good safety record
- Freezing eggs does not guarantee a future pregnancy
Can repeated stimulation increase cancer risk?
This is another concern women may have, particularly if more than one cycle is needed to freeze an adequate number of eggs.
Current evidence does not show a broad increase in cancer risk from fertility treatment. The evidence around ovarian cancer is more nuanced, with some studies suggesting a possible small association that may also be influenced by underlying infertility and other factors. Overall, fertility preservation is considered a low-risk procedure for most women when treatment is appropriately planned.
The important thing is to look at egg freezing as a fertility-preservation option, for women considering egg freezing, the more useful question is not whether the process will permanently change fertility, but whether it is appropriate for their age, ovarian reserve and future plans. The available evidence is broadly reassuring on long-term safety, while the number of eggs frozen and the age at which they are frozen remain important factors in future use. A consultation helps put these pieces together so that the decision is based on individual reproductive goals rather than fear around the procedure itself.