Egg Freezing (Oocyte Cryopreservation)

Medically reviewed by Dr. Shweta Agarwal, MBBS, DGO, Reproductive Medicine (IVF). Last updated: June 2026.

Information on this page is educational and does not replace a medical consultation. Individual clinical factors affect all outcomes, and no fertility procedure can guarantee a pregnancy.

Aansh Hospital & IVF Center is a Level-2 government-registered ART clinic serving Vidarbha and northern Telangana, with its headquarters and in-house embryology lab in Chandrapur. Lab operations — including all vitrification and cryostorage — are led by Senior Clinical Embryologist Aayush Agarwal, Ph.D. Treatment is led by Dr. Shweta Agarwal (MBBS, DGO, Reproductive Medicine).

अंडाणु संरक्षण (andanu sanrakshan) — egg freezing — gives women the ability to preserve their current fertility for a future decision, without pressure. This page explains the process honestly, including what it can and cannot do.

Who is egg freezing for?

Egg freezing suits women who want to preserve the option of a future biological pregnancy but are not ready — or not able — to conceive now. The common reasons are:

• Delaying childbearing for career or personal reasons. Egg quality declines gradually with age, most noticeably from the mid-30s onward. Freezing eggs at a younger age preserves eggs as they are now, for use later. This is an educational fact, not a deadline — there is no pressure to decide on any particular timeline.
• Before cancer treatment (oncofertility). Chemotherapy and radiation can permanently damage ovarian function. Freezing eggs before treatment begins preserves the option of a biological pregnancy afterwards. For women without a partner, eggs (rather than embryos) are usually the appropriate choice. See the oncofertility pathway for time-sensitive planning.
• Diminished or declining ovarian reserve. Women with low AMH or a family history of early menopause may choose to freeze eggs earlier rather than later, while reserve is higher.
• No partner yet. If you have not found the right partner but want to keep the option of using your own eggs open, egg freezing avoids the need to choose donor sperm now (which embryo freezing would require).

Egg freezing begins with fertility diagnostics — an AMH blood test and an antral follicle count on ultrasound — to assess your ovarian reserve and set realistic expectations for how many eggs a cycle may yield.

How does the egg freezing process work?

The first half of an egg freezing cycle is identical to the first half of IVF: ovarian stimulation followed by egg retrieval. The difference is that the eggs are frozen rather than fertilised immediately.

1. Ovarian reserve assessment. A consultation with Dr. Shweta Agarwal, an AMH blood test, and a baseline ultrasound estimate how many eggs can be retrieved and guide the stimulation dose.
2. Ovarian stimulation (10–12 days). Daily hormone injections (FSH ± LH) encourage the ovaries to mature multiple eggs in one cycle rather than the single egg of a natural month. Monitoring scans and blood tests every 2–3 days track the response and adjust dosing.
3. Trigger injection. When follicles reach maturity (~18–20 mm), a trigger shot completes egg maturation; retrieval is timed precisely 34–36 hours later.
4. Egg retrieval. A minor procedure under IV sedation (~15–20 minutes). A fine needle aspirates fluid from each follicle under ultrasound guidance. You go home the same day, with mild cramping or bloating for 1–2 days.
5. Vitrification. In the embryology lab, mature eggs are placed in cryoprotectant and plunged into liquid nitrogen at −196 °C within seconds — fast enough that no damaging ice crystals form. Eggs are sealed in uniquely labelled carriers, double-checked, and placed in monitored cryostorage dewars.

Only mature eggs (metaphase II) can be frozen; the embryologist assesses maturity after retrieval, so the number frozen may be slightly lower than the number retrieved.

Why does age — and egg quality — matter so much?

Age at the time of freezing is the single biggest factor in how useful frozen eggs will be later. This is an honest, important point, and any clinic that glosses over it is doing patients a disservice.

• Younger eggs freeze and thaw better, and are more likely to produce a healthy embryo. Egg quality (the proportion of chromosomally normal eggs) declines with age, particularly from the mid-30s. Freezing earlier generally means more usable eggs per cycle and a better chance per egg later.
• More eggs are usually needed at older ages. Because a smaller proportion of eggs are viable as age increases, women freezing in their late 30s may need more than one stimulation cycle to bank a comparable number of usable eggs.
• Egg freezing does not stop your body's overall ageing — it preserves the eggs frozen on that day at that biological age. The uterus and pregnancy itself are separate considerations at the time of future use.

The honest bottom line: egg freezing preserves options, not outcomes. It improves the chance of a future pregnancy using your own eggs compared to not freezing, but it is not insurance and it does not guarantee a baby. Survival on thawing, fertilisation, embryo development, and implantation each carry their own probabilities. Dr. Shweta Agarwal will give you realistic, age-appropriate expectations for your specific situation rather than a single reassuring number.

What happens to frozen eggs when you are ready to use them?

When you decide to use your frozen eggs, they are warmed and taken through the second half of an IVF cycle. The pathway is:

1. Warming (thaw). The embryologist warms the eggs from −196 °C to body temperature using a controlled reverse-cryoprotectant protocol. Eggs that survive warming in good condition proceed.
2. Fertilisation by ICSI. Frozen-thawed eggs are almost always fertilised using ICSI — a single sperm injected directly into each mature egg — because the egg's outer shell hardens slightly after freezing, making ICSI the reliable fertilisation method. Sperm at this stage comes from your partner or, if you choose, donor sperm.
3. Embryo culture. Fertilised eggs develop into embryos over 3–5 days, monitored in the lab; suitable embryos may reach the blastocyst stage.
4. Embryo transfer. A healthy embryo is transferred to the uterus in a brief outpatient procedure. Surplus good-quality embryos can themselves be frozen for later via embryo freezing.

Because the eggs are already retrieved, the future cycle skips the stimulation-for-retrieval phase that produced them — though uterine-lining preparation and the transfer cycle still apply.

How long can eggs stay frozen?

Vitrified eggs are biologically suspended at −196 °C; their quality does not deteriorate with storage time, provided liquid nitrogen levels and monitoring are continuously maintained. Published evidence indicates eggs stored for many years retain viability comparable to shorter storage periods.

Legal and consent terms in India: the ART (Regulation) Act, 2021 governs gamete storage, including written informed consent and storage conditions. ART Rules consent documentation treats cryopreserved gametes and embryos as stored for a maximum of 10 years; any continued storage, renewal, use, transfer or discard decision must follow written consent and applicable registry/clinic-record requirements (per ART Act 2021 and ART Rules 2022). At Aansh, storage is governed by a written consent and storage agreement, and you are informed in advance of any renewal or decision point.

What does egg freezing cost?

Egg freezing cost at Aansh has two parts: a one-time freezing cycle and an ongoing storage fee. Cryostorage is charged at an indicative ₹1,000 per month per straw. Final cost depends on your individual clinical evaluation.

The freezing cycle is priced like the first half of an IVF cycle — stimulation, monitoring, retrieval and vitrification, without fertilisation or transfer. Medication cost varies most between patients, depending on the stimulation dose your ovaries need. Final cost depends on individual clinical evaluation — see /costs-emi for current pricing.

You receive a transparent written cost estimate before the cycle begins, covering both the freezing cycle and the projected storage period. See IVF cost & 0% EMI for a full breakdown of what is included.