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ivf fertility
Egg Freezing
Oocyte cryopreservation is a form of assisted reproductive technology (ART) used to preserve human eggs (oocytes). The technique is often used to protect against future infertility or delaying childbearing: when pregnancy is desired, the eggs can be thawed, fertilized, and transferred to the uterus as embryos.
Quick Facts
- Price range
- Varies by clinic
- Recovery
- Varies
- Sessions
- Varies
- Category
- ivf fertility
- Anaesthesia
- Varies
- Min. stay abroad
- Varies
- Price Range (International)
- Varies by clinic
- Average Recovery
- Varies
- Typical Sessions
- Varies
- Category
- ivf fertility
Overview
Egg freezing, medically known as oocyte cryopreservation, is a form of assisted reproductive technology used to preserve a woman's eggs (oocytes) for future use. It is commonly used to delay childbearing and to protect against future infertility; when pregnancy is later desired, the stored eggs can be thawed, fertilised and transferred to the uterus as embryos. The first human birth from frozen eggs was reported in 1986, and although embryo freezing is a more established method of fertility preservation, egg freezing is often the preferred option for single women of reproductive age who wish to postpone having children. The egg-retrieval process is the same as in in-vitro fertilisation: the woman receives one to several weeks of hormone injections to stimulate the ovaries to mature multiple eggs, a final maturation step is given, and the mature eggs are then collected by transvaginal retrieval, usually under sedation, and frozen immediately. Because the egg is the largest cell in the body and contains a great deal of water, it must be dehydrated before freezing using cryoprotectants that replace most of the water and inhibit the formation of damaging ice crystals. Eggs are frozen either by a slow-cooling method or by vitrification, a newer flash-freezing technique that uses higher concentrations of cryoprotectant to turn the cell into a glass-like solid free of ice crystals; vitrification is associated with higher survival rates and enhanced development. Success rates vary with factors such as the woman's age, being higher in younger individuals.
Key Considerations
Common Risks
- Ovarian hyperstimulation syndrome (OHSS) from the medications used to stimulate the ovaries
- Abdominal bloating, mild discomfort, nausea or vomiting (mild to moderate OHSS)
- Severe OHSS with marked bloating, dehydration and reduced urine output
- Increased risk of deep vein thrombosis or pulmonary embolism in severe OHSS
- Minor complications related to the egg-collection procedure
Credentials a clinic should hold
Specialty-board certifications and facility-level accreditations relevant to this procedure. Verify on the issuer's public register before booking — most issuers publish a searchable directory.
HFEA-licensed fertility centre
Issuer Human Fertilisation and Embryology Authority (UK)
UK statutory licence for any clinic providing IVF, ICSI, donor cycles, or embryo storage. The HFEA publishes per-clinic success and adverse-event data.
Verify on the issuer's register →SART member clinic
Issuer Society for Assisted Reproductive Technology
US fertility-clinic professional society; member clinics submit standardised outcomes to the CDC ART national registry.
Verify on the issuer's register →ESHRE-certified ART centre
Issuer European Society of Human Reproduction and Embryology
European fertility-clinic certification covering laboratory standards, embryology QC, and clinical-outcome reporting.
Verify on the issuer's register →
Current clinical trials
Ongoing research studies registered on ClinicalTrials.gov whose intervention involves egg freezing. This is a neutral pointer to public research — not an endorsement, not a recruitment drive, and not medical advice. Trial status changes often; confirm eligibility and current status with the study team via each record.
- Not yet recruitingInterventional· Started 2026-04-13Decision Aid for Elective Egg FreezingNCT07543445· National Taiwan University Hospital· Elective Egg Freezing, Oocyte Cryopreservation, Decision Aid
- RecruitingObservational· Started 2025-08-25Ovarian Tissue Cryopreservation Combined With Oocyte Cryopreservation Versus Oocyte Cryopreservation AloneNCT07546123· IRCCS Azienda Ospedaliero-Universitaria di Bologna· Oncological Disease, Fertility Preservation
- RecruitingInterventional· Started 2024-11-05Virtual Reality Intervention to Reduce Pain in Women Undergoing Elective Oocyte CryopreservationNCT07484815· Hadassah Medical Organization· Procedure-Related Pain, Acute Pain
- RecruitingInterventional· Started 2024-07-18Paired Non-inferiority Study Comparing Overture Semi-automated Vitrification System ("DaVitri") to Standard Manual Process for Clinical Pregnancy OutcomesNCT06853418· Overture Life· Oocyte Cryopreservation
Showing 4 recent ongoing studies. Source: ClinicalTrials.gov — all matching trials (U.S. National Library of Medicine, public domain). Retrieved 2026-08-02.
Recovery Timeline
Average recovery for Egg Freezing is 0 days. Individual recovery varies — always follow your surgeon’s specific guidance.
- 01Day 0–1
Immediate
First 24–48 hours post-procedure. Monitoring, anaesthesia recovery, initial pain management. Most clinics expect you to remain on-site or nearby.
- 02Day 2–2
Early recovery
Wound care, swelling or bruising peaks, restricted activity. Typical window for follow-up visits and drain removal if applicable. Travel is usually not advised.
- 03Day 3–3
Intermediate recovery
Gradual return to non-strenuous daily activity. Many international patients fly home during this window. Surgeon may require medical clearance for long-haul travel.
- 04Day 4–0
Full recovery
Return to full activity, exercise, and work. Final results may still be settling. Final follow-up with local doctor recommended.
Questions to Ask Your Clinic
Browse all destinations offering Egg Freezing →Detailed cost breakdown →
Frequently Asked Questions
What is egg freezing?
Egg freezing, or oocyte cryopreservation, is a form of assisted reproductive technology that preserves a woman's eggs. When pregnancy is later desired, the eggs can be thawed, fertilised and transferred to the uterus as embryos.
Why do people freeze their eggs?
It is often used to delay childbearing and to protect against future infertility. It is frequently considered the preferred option for single women of reproductive age who wish to postpone having children, since it does not require sperm at the time of freezing.
How are the eggs collected?
The retrieval process is the same as for IVF. It involves one to several weeks of hormone injections to stimulate the ovaries to mature multiple eggs, followed by transvaginal retrieval of the mature eggs, usually under sedation. The eggs are then frozen immediately.
What is vitrification?
Vitrification is a newer flash-freezing method that is much faster than slow-cooling and uses higher concentrations of cryoprotectant, producing a glass-like cell free of ice crystals. It is associated with higher survival rates and better development compared with slow-cooling.
Does age affect success?
Yes. The procedure's success rate varies with factors such as age, overall health and genetic factors, with higher odds of success in younger individuals.
What is the main risk of egg freezing?
Most risks relate to the medications used to stimulate the ovaries rather than the freezing itself. The main one is ovarian hyperstimulation syndrome (OHSS), which is usually mild but can, in severe cases, cause serious complications and require hospital care.
Conditions treated
Clinical conditions for which egg freezing is a treatment-ladder option.
Related Procedures
Other ivf fertility procedures in our registry