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Fertility preservation

Egg freezing – securing fertility for the future

Egg freezing is an effective way to preserve fertility for the future – it allows women to preserve their own eggs in the best quality and use them when they decide to become mothers, even if their natural fertility declines with age or health issues arise.

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Egg freezing

What is egg freezing?

Egg freezing involves collecting eggs, then freezing and storing them under special conditions so that they can be used in the future, for example during infertility treatment. This method allows women to preserve their fertility for later years. This is particularly important because, with age, both the number and quality of eggs gradually decline, and women's ovarian reserve decreases. Freezing eggs at an earlier stage of life increases the chances of having children in the future when natural fertility begins to decline.

Conscious motherhood

Who should consider freezing their eggs?

Egg freezing is a solution for women who want to consciously take care of their fertility and give themselves a better chance of motherhood in the future. The decision to freeze eggs is particularly worth considering if:

  • You plan to postpone motherhood for personal, professional or life reasons,

  • You are over 30 years old and are aware that with age, your natural ovarian reserve and egg quality decrease,

  • There have been cases of premature menopause or other fertility problems in your family,

  • You are facing cancer treatment or other therapy that may adversely affect your fertility (e.g. chemotherapy, radiotherapy),

  • You have been diagnosed with diseases that may lead to faster depletion of your ovarian reserve (e.g. endometriosis, autoimmune diseases).

  • You want to have a so-called ‘policy for the future’ that will increase your chances of becoming a mother, even if you have difficulties getting pregnant in the future.

Egg freezing procedure

Step by step: what does the procedure for retrieving and freezing eggs involve?

Freezing eggs can take up to three weeks and involves the following steps:

Stimulating the ovaries

Step 1

Hormonal stimulation of the ovaries

First, hormonal stimulation is performed to obtain a larger number of mature eggs than in a natural cycle. During the stimulation, which lasts up to several days, you take medication to stimulate the growth and maturation of a larger number (optimally several) of cells. Stimulation is performed on an outpatient basis – the patient takes the appropriate medication and the stimulation process is monitored by a doctor every few days (ultrasound scans are performed and hormone levels are measured).

Step 2

Egg retrieval

The next stage is egg retrieval. Ovarian puncture is performed under analgesic sedation (short-term anaesthesia), during which the contents of the ovarian follicles (eggs) are retrieved transvaginally under ultrasound guidance. You can go home approximately two hours after the collection of the cells.

Egg retrieval
egg freezing

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Egg freezing

The retrieved cells are sent to a laboratory and frozen by rapid cooling in a process known as vitrification, which effectively preserves their reproductive potential. The cells preserved in this way are stored in liquid nitrogen and can be used to achieve pregnancy through in vitro fertilisation.

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Effectiveness and safety of egg freezing

Egg freezing is a modern and safe method that allows women to consciously plan for motherhood in the future. The procedure involves freezing the cells at –196°C using cryoprotective agents. Both scientific data and clinical practice confirm that over 90% of eggs survive the freezing and thawing process. Importantly, properly thawed cells have comparable developmental potential and chances of fertilisation as ‘fresh’ cells, i.e. cells that have never been frozen. Frozen eggs can be stored for many years without deterioration in their quality or ability to fertilise. Long-term storage does not adversely affect the developmental potential of the cells or the health of children born using them. Numerous scientific studies show that these children develop normally and are just as healthy as children conceived naturally or using fresh cells.

The effectiveness of treatment using frozen eggs largely depends on the woman's age at the time of retrieval. The younger the patient, the higher the quality of the cells and the greater the chances of successful treatment. With age, the number of cells that need to be frozen to realistically protect fertility increases. According to the latest data (Fertility and Sterility, 2025), a woman aged around 35 should freeze a dozen or so eggs, and a 38-year-old woman should freeze several dozen.

The entire procedure is preceded by controlled hormonal stimulation, which allows for a greater number of mature eggs to be obtained in a single cycle. The use of modern treatment protocols means that stimulation is well tolerated by most patients, and the risk of complications, including ovarian hyperstimulation syndrome, has been virtually eliminated. The most common symptoms are temporary discomfort. The collection of cells is performed under short intravenous anaesthesia, is painless and does not require hospitalisation.

Egg freezing FAQ

Egg freezing – frequently asked questions

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Egg freezing

How can we help you?

If you are unsure whether egg freezing is the right option for you, or if you have questions that remain unanswered, our Patient Support Team is here to help.

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