EGG FREEZING

   (Samajweekly)  Egg freezing is medically known by the name oocyte cryopreservation, it is a method of preserving a woman’s fertility by extracting, freezing and storing her eggs under favourable medical condition which may be used (oocytes) for future use. It was originally developed by medical experts to assist women undergoing treatments like chemotherapy, which could impair their fertility, egg freezing has evolved into a viable option for women who want to delay childbearing for personal, professional or medical reasons.

As the study and research of reproductive medicine science has undergone a major progressive change in such a scenario egg freezing has gained considerable attention throughout the world for its potential to offer reproductive autonomy. However, like any medical intervention, it presents a complex landscape of benefits and limitations.

Medical Process of Egg Freezing

1. Ovarian Stimulation:

The process begins with hormonal stimulation using gonadotropins to encourage the ovaries to mature multiple eggs instead of the usual one per cycle.

2. Monitoring:

Transvaginal ultrasounds and blood tests are used over 10–14 days to monitor follicular development.

3. Egg Retrieval:

Once follicles are mature eggs are retrieved via transvaginal aspiration under ultrasound guidance and mild sedation.

4. Cryopreservation:

The mature eggs are rapidly frozen using vitrification, a flash-freezing method that prevents the formation of ice crystals which can damage the cell.

5. Storage:

Frozen eggs are stored in liquid nitrogen at −196°C. They can remain viable for years without degradation.

6. Future Use:

When a woman decides to use her eggs, they are thawed, fertilized via Intracytoplasmic Sperm Injection (ICSI), and the resulting embryos are transferred to the uterus.

Medical Indications

Egg freezing may be considered as an viable option in the following contexts:

Medical:

Women undergoing chemotherapy/radiation

Premature ovarian insufficiency

Autoimmune diseases (e.g., lupus)

Elective (Social):

Delaying childbearing for career or personal reasons

Lack of a suitable partner

Concerns about age-related fertility decline

Ethical/Religious:

For patients who prefer egg over embryo freezing due to moral beliefs

Advantages of Egg Freezing

1. Fertility Preservation

Allows women to preserve younger, healthier eggs, reducing the impact of age on fertility.

2. Reproductive Autonomy

Empowers women to make informed reproductive choices without being constrained by biological age.

3. Medical Safeguard

Vital for cancer patients or those with chronic illnesses affecting reproductive organs.

4. Improved Technology

Vitrification has significantly improved survival and fertilization rates of thawed eggs.

5. Psychosocial Benefits

Reduces anxiety related to age and fertility, especially for women in high-pressure careers or education.

Disadvantages and Risks

1. No Guarantee of Pregnancy

Success rates is varied as the whole process of egg freezing is based on the age of women at the time of freezing and the number of eggs retrieved.

A woman under 35 may need to freeze 10–20 eggs for a reasonable chance at one live birth.

2. Costly and Not Always Covered

High costs is involved in the process of egg freezing and more than often it is not covered under insurance policies

3. Invasive and Time-Consuming

Ovarian stimulation and egg retrieval require multiple clinic visits, hormone injections and sedation.

4. Medical Risks

Ovarian Hyperstimulation Syndrome (OHSS)

Anesthesia-related complications

Bleeding or infection from egg retrieval

5. Ethical and Emotional Considerations

Future decisions about unused eggs

Emotional impact if the process fails

Success Rates and Age Factor

Optimal age for freezing: Before 35 years, as both the quality and quantity of eggs decline with age.

Live birth rate per thawed egg:

Under 35: ~6–12%

Over 38: significantly lower, often <5%

Multiple eggs are usually needed to achieve one successful pregnancy, especially if frozen at an older age.

Legal and Ethical Considerations

Ownership and disposal of unused eggs can become legally complex in cases of death or divorce. Ethical concerns include commercial exploitation and the pressure it may create on women to delay childbirth.

Some countries limit egg freezing to medical reasons only, while others allow elective freezing with specific regulations.

Recent Developments and Future Prospects

Advances in artificial intelligence are being used to assess egg quality more accurately.

Research is ongoing in in vitro maturation (IVM) and artificial ovaries, potentially eliminating or reducing the need for hormone stimulation.Broader insurance coverage and employer support (e.g., by tech firms) are changing societal attitudes toward egg freezing.

Egg freezing is a transformative technology offering hope and flexibility to women seeking to preserve fertility. While its growing popularity is fueled by improved medical techniques and changing social norms, it remains a complex medical decision. Women considering oocyte cryopreservation should consult with reproductive endocrinologists, understand the limitations and weigh the emotional, financial and physical implications..