What is What is Egg Freezing?
💡 Egg freezing is oocyte cryopreservation — unfertilised eggs retrieved after ovarian stimulation are vitrified at −196°C and stored for future IVF use. Post-thaw survival: >90% with vitrification. Success is strongly age-dependent: best before 35. Used for social, medical, and oncofertility preservation.
Egg freezing (oocyte cryopreservation) is a fertility preservation procedure in which unfertilised eggs are retrieved after ovarian stimulation, vitrified at −196°C, and stored for future IVF use. It pauses the biological clock — allowing women to use their eggs from a younger age at a future point of their choosing.
🇮🇳 India Context: What is Egg Freezing is widely assessed and treated across major Indian fertility centres including Chennai, Mumbai, Bangalore, Delhi, and Hyderabad.
What are the key characteristics of What is Egg Freezing?
- Process: ovarian stimulation (10–14 days) → egg retrieval → vitrification at −196°C → cryostorage
- Vitrification (flash-freezing in cryoprotectant) achieves >90% post-thaw egg survival — far superior to slow freezing
- Average eggs retrieved per cycle: 10–15 (normal responders); 1–5 (poor responders); predicted by AMH and AFC
- Age-dependent success: <35 — best outcomes; 35–37 — acceptable; >38 — significantly reduced per-egg viability
- Indications: social (elective delay), medical (pre-chemotherapy, autoimmune disease), oncofertility, gender-affirming care
- Eggs stored indefinitely in liquid nitrogen — no enforced legal storage limit in India
- When ready to use: eggs thawed, fertilised via ICSI, embryos cultured to Day 5, transferred in FET cycle
- Cost in India: ₹80,000–₹1,50,000 per retrieval cycle + ₹10,000–₹20,000 per year storage
How does What is Egg Freezing work?
Why does What is Egg Freezing matter in fertility?
Egg freezing success is strongly age-dependent — women who freeze before age 35 achieve live birth rates of 40–50% per thaw cycle (with ≥15–20 mature eggs). After 37, success rates decline significantly with each passing year. Banking ≥15–20 mature eggs before 35 provides the best cumulative chance of a live birth. The technology is identical to the egg retrieval phase of conventional IVF. In India, elective egg freezing is increasingly available at urban IVF centres. Candidates should undergo AMH and AFC assessment before deciding on timing — poor ovarian reserve may necessitate urgent banking.
What are related terms to What is Egg Freezing?
Embryo Freezing (Cryopreservation)
Embryo Freezing (Cryopreservation) is a laboratory procedure in which high-quali…
Egg Retrieval (Oocyte Pick-Up)
Egg Retrieval (also called Oocyte Pick-Up or OPU) is a minor surgical procedure …
IVF (In Vitro Fertilisation)
IVF (In Vitro Fertilisation) is an assisted reproductive technology (ART) in whi…
FAQs about What is Egg Freezing
What is egg freezing?
Egg freezing (oocyte cryopreservation) is a fertility preservation procedure in which unfertilised eggs are retrieved after ovarian stimulation, vitrified (flash-frozen) at −196°C, and stored for future IVF use. Post-thaw survival: >90%. Success is strongly age-dependent — best results before age 35.
How does egg freezing work?
Ovarian stimulation with FSH injections over 10–14 days develops multiple follicles. Eggs are retrieved under sedation via transvaginal aspiration, assessed for maturity, then vitrified in cryoprotectant solution and plunged into liquid nitrogen. When needed, eggs are thawed, fertilised via ICSI, and transferred as embryos.
What is the success rate of egg freezing?
Success is age-dependent. Women who freeze eggs before 35 achieve live birth rates of 40–50% per thaw cycle (banking ≥15–20 mature eggs). After 37, per-egg viability declines significantly with age. Vitrification achieves >90% post-thaw egg survival — the technology is not the limiting factor; age and egg number are.
How many eggs should I freeze?
To have a reasonable chance of at least one live birth, most reproductive specialists recommend banking ≥15–20 mature eggs before age 35, or ≥20–25 eggs at 35–37 years. Poor responders may need multiple retrieval cycles. AMH and AFC predict how many eggs can be expected per cycle.
How much does egg freezing cost in India?
Egg freezing costs ₹80,000–₹1,50,000 per retrieval cycle in India (medications + egg retrieval + vitrification). Annual storage is ₹10,000–₹20,000. Multiple cycles may be needed for poor responders. When eggs are used in future IVF, additional FET cycle costs apply (₹30,000–₹80,000).
At what age should I freeze my eggs?
Before 35 is optimal — egg quality and quantity are highest, and vitrification outcomes are best. Between 35–37 is still viable. After 38, per-egg viability declines significantly; multiple cycles may be needed to bank sufficient eggs. AMH and AFC testing should guide the urgency of egg freezing.
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