Oocyte vitrification: what it is and when it is recommended

La oocyte vitrification It is a biomedical technique that has marked a turning point in the way preserve female fertilityThanks to its effectiveness and safety, it has become an increasingly popular option for women who wish to postpone motherhood without compromising their future reproductive possibilities.

In this article, we address, from a medical and informative perspective, what oocyte vitrification is, when it is recommended, how it is performed, its cost, and its role within current strategies for preserve fertility consciously and in a planned manner. 

Although it is often said thatfertility preservationThe more accurate term is oocyte vitrificationbecause this technique does not preserve fertility as a whole, but only the oocytes. 

This is a procedure that allows to keep the eggs in optimal condition for possible future use, without this guaranteeing a pregnancy.

What is oocyte vitrification?

La oocyte vitrification it's a technique cryopreservation Ultra-rapid freezing allows eggs to be preserved without the formation of ice crystals inside them. By preventing these crystals, the cellular structure and functionality of the oocyte remain intact. This method has replaced traditional slow freezing due to its higher survival rate and better clinical outcomes.

The procedure involves exposing mature oocytes to specific cryoprotective solutions and then immersing them almost instantaneously in liquid nitrogen at -196°C. This allows the eggs to be stored for years without significant alterations in their quality, making it a oocyte vitrification in a key tool for to preserve a patient's current fertility over time.

Key data: Although it is commonly referred to as “egg freezing”, the technically correct term is oocyte vitrification.

When is vitrification indicated?

 

The decision to resort to the oocyte vitrification It can be for both personal and medical reasons. Among the most frequent indications for preserve fertility are:

• Women between 30 and 35 years old who wish to postpone motherhood for personal, professional or social reasons.
• Patients diagnosed with cancer who must undergo gonadotoxic treatments such as chemotherapy or radiotherapy.
• Women with endometriosis advanced, especially when there is ovarian involvement.
• Cases of genetic or familial risk of premature ovarian failure.
• Patients with persistent ovulatory disorders, such as certain forms of polycystic ovary syndrome.

Initial assessment: diagnosis and personalization

Before beginning the vitrification process, a thorough medical evaluation is performed. This includes:

• Hormonal analysis: AMH (anti-Müllerian hormone), FSH, LH, estradiol.
• Transvaginal ultrasound to count antral follicles.
• Review of medical history and lifestyle habits.

This study determines ovarian reserve, that is, how many potential eggs the ovary can produce in response to hormonal stimulation. With this data, the medical team designs a personalized protocol that optimizes ovarian stimulation and subsequent vitrification.

Step-by-step procedure phases

The complete process usually lasts between 10 and 14 days and consists of five phases:

1. Personalized ovarian stimulation

   • Hormones (gonadotropins) are administered to promote the growth of multiple follicles.
   • It is monitored using ultrasounds and hormonal analyses.
     

2. Follicular puncture

   • It is performed in an operating room under sedation.
   • Mature eggs are aspirated using a cannula guided by ultrasound.
     

3. Oocyte selection

   • Only mature oocytes (in MII phase) are selected, as these are suitable for vitrification.
     

4. Vitrification with high-precision devices

   • State-of-the-art cryopreservation technologies are used in a cryoprotective medium.
   • Electronic traceability and individual identification are ensured.
     

5. Storage in liquid nitrogen

   • The eggs are preserved in cryopreservation tanks at -196ºC.
   • It is carried out under strict biosafety protocols.

Success rates and determining factors

The main factor that determines the success of the oocyte vitrification is the age at the time of extraction:

• In women under 35 years of age, oocyte survival rates exceed 90%.
• The chances of future pregnancy are higher when this has been achieved Preserving fertility through oocyte vitrification  at younger ages.
  The experience of the medical team and the quality of the laboratory also have a decisive influence on the results.

Cost of oocyte vitrification

The cost of the oocyte vitrification In Spanish clinics, the cost typically ranges from €2.500 to €5.000 and includes the initial evaluation, ovarian stimulation, egg retrieval, vitrification, and the first year of storage. In some cases, financing options or partial coverage are available when medically indicated.

Preserving fertility today: key points and current considerations 

The possibility of preserve fertility It has transformed the way many women plan their motherhood. oocyte vitrification It allows for the preservation of reproductive potential, in terms of both quantity and quality of oocytes, at a specific stage of life and their use later, when personal or medical circumstances permit. This approach frequently raises questions that should be clarified from a medical perspective and based on scientific evidence. 

What does it mean to preserve fertility? 

Preserving fertility involves preserving eggs or sperm in optimal conditions for future use. In women, the oocyte vitrification It is currently the most effective technique for preserve fertilitymaintaining the oocyte quality associated with the age at which the procedure is performed.

Does biotin increase fertility? 

There is no solid scientific evidence to show that biotin increases fertility. Although a balanced diet is important, preserve fertility It depends mainly on age, ovarian reserve, and reproductive health.

What should a woman do to be more fertile? 

Maintaining healthy habits, avoiding tobacco, managing stress, and having regular gynecological checkups helps protect fertility. Even so, age remains the most determining factor, which reinforces the importance of... oocyte vitrification as a strategy to preserve fertility.

Frequently asked questions about oocyte vitrification 

How much does egg vitrification cost? 

The cost of vitrification varies depending on the center, but the usual range is between €2.500 and €5.000 and includes:

• Initial medical consultation + hormone tests.
• Personalized ovarian stimulation and ultrasound monitoring.
• Follicular puncture and extraction.
• Vitrification and initial storage (first year).

Some clinics offer financing options or partial coverage in medical cases (cancer, hereditary diseases, etc.).

How long does a vitrified embryo last? 

There is no strict limit. Both vitrified oocytes and embryos can be kept for many years without losing quality, allowing preserve current oocyte quality long term.

How many eggs are recommended for vitrification? 

It depends on age and ovarian reserve. As a general guideline, vitrifying between 8 and 15 oocytes in young women offers good chances of future pregnancy.

Inebir: excellence, precision and human support

At INEBIR, we combine cutting-edge technology with a patient-centered approach. Our clinic features:

• State-of-the-art cryopreservation technologies in a cryoprotective medium.
• Individualized electronic identification devices.
• Audited digital tracking system.
• Multidisciplinary team: gynecology, embryology, endocrinology and psychology.
• Comprehensive advice from the first consultation to the storage of oocytes.

All of this is done with an ethical, personal approach and supported by scientific evidence.

Beyond medicine: emotional benefits

Vitrification is not just a clinical solution. It also represents a powerful emotional tool:

• It reduces anxiety linked to the "biological clock".
• It allows for more freedom in making reproductive decisions.
• It strengthens personal autonomy and family planning without pressure.

Do you wish to preserve your fertility?

Schedule a consultation with the medical team at INEBIR and receive a personalized plan for preserve fertility through oocyte vitrification, backed by advanced technology and an ethical and human approach. 

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