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Frozen Embryo Transfer (FET) at Cloudnine

A precisely timed transfer of your frozen embryos, with success rates that match and often exceed fresh transfer.

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Overview
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What Is Frozen Embryo Transfer?

Frozen Embryo Transfer (FET) is a fertility procedure in which an embryo created during an IVF cycle and stored by cryopreservation is thawed and transferred into the uterus, in a cycle timed separately from egg retrieval. Because the transfer happens in its own cycle, the uterine lining can be prepared without the effect of ovarian-stimulation hormones.

FET is used in several situations  a planned freeze-all cycle, after a fresh transfer that didn't result in pregnancy, a sibling cycle using embryos from an earlier IVF round, or a donor-embryo cycle. It can be carried out in a natural cycle or a medicated cycle, depending on your menstrual pattern. For many patients, modern FET success rates are comparable to, or higher than, fresh transfer.

Why Choose Cloudnine for Frozen Embryo Transfer

[N]+ FET Cycles Performed
[N]+ FET Cycles Performed
Cloudnine has performed [N] FET cycles across [N] centres since [year], with outcomes data tracked continuously.
[X]% Embryo Survival After Thaw
[X]% Embryo Survival After Thaw
Our embryology labs achieve a [X]% post-thaw survival rate using vitrification and time-lapse incubation, protecting embryo quality from freeze to transfer.
NABH-Accredited Cryostorage
NABH-Accredited Cryostorage
Embryos are stored in dedicated cryopreservation tanks with continuous temperature monitoring, alarms and backup systems, meeting NABH and international standards.
Natural and Medicated Cycle Protocols
Natural and Medicated Cycle Protocols
Your specialist selects the right approach a natural cycle for predictable ovulation, or a medicated cycle for more controlled timing and lining preparation.
Experienced Embryo-Transfer Specialists
Experienced Embryo-Transfer Specialists
Transfers are performed under ultrasound guidance by specialists with extensive cycle experience, for precise, gentle embryo placement.
Transparent Pricing, No Hidden Costs
Transparent Pricing, No Hidden Costs
You receive an itemised cost breakdown at consultation, with what's included made clear before you commit. EMI options are available.
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What Is FET & How Does It Work?

  • Choosing the Protocol: Your specialist selects either a natural cycle (timed to your own ovulation) or a medicated cycle (using hormones to prepare the uterus), based on your menstrual pattern and history.
  • Endometrial Preparation: Hormone medication, or natural ovulation tracking, prepares the uterine lining (the endometrium) over about 2-3 weeks, monitored with ultrasound and blood tests.
  • Embryo Thawing: On transfer day, the embryo is carefully thawed in the lab and its survival confirmed before the procedure goes ahead.
  • Embryo Transfer: The thawed embryo is placed in the uterus through a thin catheter under ultrasound guidance  a quick, painless outpatient procedure.
A complete FET cycle takes about 3-5 weeks from cycle start to transfer; the transfer itself is a ~15-minute procedure.
The transfer feels similar to a Pap smear minimal discomfort, no sedation needed.
Natural cycle FET suits women with regular ovulation; medicated cycle FET allows precise timing and is often used after PGT or for irregular cycles.

Who Should Consider FET?

For many patients, FET is a planned primary strategy rather than a fallback. Embryos are often frozen deliberately to allow genetic testing, to let the body recover after stimulation, or to time pregnancy around health and life circumstances. Whether FET is right for you depends on your diagnosis, your embryos and your history, and which protocol suits you. A consultation helps identify the best approach.
Planned Freeze-All Cycles
When raised progesterone, OHSS risk or PGT testing makes a fresh transfer less ideal, all embryos are frozen and transferred in a later, better-prepared cycle.
After OHSS or a High Stimulation Response
When stimulation produces many follicles or high oestrogen, freezing all embryos and transferring later protects your health.
After a Failed Fresh Transfer
When a fresh transfer hasn't led to pregnancy, FET in a later cycle gives the uterine lining time to recover.
Sibling Cycles After a Successful IVF
Couples returning for a second child often use embryos frozen during their original IVF cycle.
With PGT (Genetic Testing)
When embryos are tested for genetic conditions, results take several days, so embryos are frozen and transferred in a planned FET cycle.
Donor-Embryo Cycles
Recipients of donor embryos use FET to time the transfer with their own uterine preparation.
Cancer Survivors Using Preserved Embryos
Embryos frozen before chemotherapy or radiation can be transferred years later, after recovery.
Couples Preferring Planned Timing
For health, work or personal reasons, some couples deliberately freeze embryos and transfer at a chosen later date.
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Not sure if FET is right for your situation?

Book a consultation and our specialists will recommend the best protocol for you.
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Your Step-by-Step FET Journey

A frozen embryo transfer cycle is shorter and gentler than a fresh IVF cycle  there's no ovarian stimulation and no egg retrieval. Here's what to expect at each stage, with the time and support markers you need to plan around.
Step 1
Initial Consultation
Meet your fertility specialist to review your stored embryos, discuss timing and decide between natural and medicated cycle protocols. [Time: 30-45 min]
Step 2
Cycle Planning
Your specialist confirms the protocol, schedules any cycle medications, and sets your monitoring calendar. [Time: about 1 week]
Step 3
Endometrial Preparation
Through your natural cycle or with hormone medication, the uterine lining is prepared over 2-3 weeks, with ultrasound and blood-test monitoring. [Time: 2-3 weeks]
Step 4
Embryo Thaw and Transfer
On transfer day the embryo is thawed and its survival confirmed; the transfer itself takes about 15 minutes under ultrasound guidance. [Time: half-day visit]
Step 5
Luteal Phase Support
Hormone medication (luteal support) continues for the next 10-12 days to support the uterine lining and any potential pregnancy. [Time: 10-12 days]
Step 6
Pregnancy Test & Next Steps
A blood pregnancy test is done about 12 days after transfer. We discuss next steps either way including planning a further FET if needed. [Time: ~2 weeks post-transfer]

Precautions and Aftercare

  • Take Cycle Medication Exactly as Prescribed: Endometrial-preparation hormones must be taken at consistent times. Set alarms, and don't skip or delay doses without speaking to your specialist.
  • Continue Luteal Support After Transfer: Hormone support continues for 10-12 days after transfer. Stopping early can affect implantation.
  • Rest on Transfer Day, Then Resume Normal Activity: Take it easy on transfer day. From the next day, gentle normal activity is fine  strict bed rest is not necessary and isn't supported by evidence.
  • Avoid Strenuous Exercise and Sex for 24-48 Hours: Light walking is fine. Avoid intense exercise, heavy lifting and sexual activity for the first day or two.
  • Limit Alcohol, Tobacco and Caffeine:  Avoid alcohol and tobacco through the cycle and the two-week wait; limit caffeine to about one cup a day.
  • Eat Well, Sleep Well, Stay Hydrated: Balanced nutrition, 7-9 hours of sleep and good hydration support implantation and recovery.
  • When to Call Your Doctor: Contact your specialist if you experience: severe abdominal pain · heavy bleeding (more than spotting) · fever above 38°C · severe headache · any signs of infection.
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How long does an FET cycle take?

A frozen embryo transfer cycle usually takes about 3-5 weeks from the start of cycle preparation to the transfer, followed by a two-week wait for the pregnancy test. The exact length depends on whether you have a natural or medicated cycle. Your specialist confirms your timeline at consultation.

What's the success rate of FET?

FET success depends mainly on the age at which the eggs were retrieved, embryo quality and protocol, with the highest rates for embryos frozen before age 35. Modern FET rates are comparable to fresh transfer for many patients. Your specialist will discuss realistic, age-based expectations for your situation.

Is FET better than fresh embryo transfer?

Neither is universally better it depends on your situation, and modern evidence shows FET often equals or exceeds fresh transfer for many patient profiles. Fresh transfer is still preferred in some cases, such as a low embryo yield. Your specialist will recommend the right approach for you.

How much does FET cost in India?

A standard FET cycle costs less than a fresh IVF cycle because it doesn't involve stimulation or egg retrieval; at Cloudnine the range is ₹[X]-[Y], with medication and storage billed separately. We share an itemised breakdown before you begin. See the Cost section for details.

What's the difference between natural cycle and medicated cycle FET?

In a natural cycle FET, the transfer is timed to your own ovulation with minimal medication; in a medicated cycle, hormones prepare the uterine lining for more controlled timing. Natural cycles suit regular ovulation, medicated cycles suit irregular cycles or post-PGT timing. Your specialist recommends the right one for you.

Frozen Embryo Transfer (FET)

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Frozen Embryo Transfer (FET)

WHAT IS FROZEN EMBRYO TRANSFER (FET)?

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Frozen embryo transfer (FET) is a technique typically employed during in vitro fertilisation (IVF) and intracytoplasmic sperm injection (ICSI) routines. The procedure is designed to cryopreserve surplus embryos after transferring up to two embryos to the uterus in any given fertility cycle. Embryos can be frozen at any stage of development during the IVF process. However, studies have shown that freezing embryos on Day 5 has its advantages. Such embryos are known as blastocysts.

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WHY CHOOSE FROZEN EMBRYO TRANSFER?

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Cryopreserving embryos for the future presents several advantages, including greater savings, access and convenience.

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BLASTOCYST DEVELOPMENT

Allowing embryos to grow up to 5 days means that only the healthiest embryos survive, displaying natural selection. 5-day old blastocysts are more likened to organically developed embryos of a natural fertility cycle. As a result, the likelihood of implantation and pregnancy increase.

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REPOSITORY OF SURPLUS EMBRYOS

The freezing of surplus embryos offers you a backup bank in case your first embryo transfer routine does not result in pregnancy. Frozen embryo transfer (FET) also entails a much lower cost and timeframe than if you were to restart an in vitro fertilisation (IVF) procedure from the ovum retrieval stage.

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UNCONDUCIVE UTERUS

You may be advised by your doctor to freeze all your embryos in a given IVF cycle, especially when your endometrium exhibits traits of suboptimality. An underprepared endometrium may stem from the presence of a polyp or excessive endometrial fluid. In either situation, a transferred embryo presents minimal chances of implantation, and you may be advised to freeze your embryos until your uterus is more receptive.

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OVARIAN HYPERSTIMULATION

Women with polycystic ovaries are prone to ovarian hyperstimulation. If severely stimulated ovaries are noticed, your embryo transfer may be postponed to the next month, allowing your ovaries enough time to heal.

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ELEVATED HORMONES

Abnormally elevated hormones in an IVF cycle can adversely affect the endometrium and reduce chances of implantation. In such a case, a FET the following month is a recommended option.

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GENETIC TESTING OF EMBRYOS

Genetic testing of embryos via preimplantation genetic diagnosis (PGD) and preimplantation genetic screening (PGS) is a useful tool to filter out embryos that display an unfavourable genetic predisposition.

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IS FROZEN EMBRYO TRANSFER RIGHT FOR ME?

As you embark on your in vitro fertilisation (IVF) journey, it's as important to be patient as it is to be positive. One of the reasons that healthy embryos fail to implant is a mismatch between their stage of growth and that of the endometrium. This could be because of high hormone levels or an array of other factors. Freezing embryos and transferring them in a subsequent cycle into an appropriately prepared endometrium offers superior pregnancy rates. Alternatively, you may choose to freeze your embryos if you plan on expanding your family further a few years down the line. On Cloudnine, the success rate of frozen embryo transfer (FET) is 60%, as compared to 40%, of fresh embryo transfers.

WHAT ARE THE STEPS OF FROZEN EMBRYO TRANSFER?

1. PRELIMINARY SCREENING

If this hasn't already been done during the IVF procedure, your fertility specialist may screen you and your partner for infections such as Hepatitis B.

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2. EMBRYO FREEZING

A superior technique called rapid freezing is used to flash-freeze the selected embryos. The process ensures minimal damage to the embryos and presents a 90% survival rate upon thawing. Although frozen embryos can be stored indefinitely, Indian law states that frozen embryos can be stored only up to five years.

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3. FROZEN EMBRYO TRANSFER

Whenever your uterus is conducive to embryos, your fertility consultant will thaw one or more embryos and carefully place them into your uterine cavity. On Cloudnine, we believe in giving you the best pregnancy possible, thereby limiting the number of embryos we deposit, to two per cycle.

WHAT ARE THE RISKS OF FROZEN EMBRYO TRANSFER?

Frozen embryo transfer (FET) may give rise to risks if not carried out properly. On Cloudnine, we invest long hours ensuring that your procedure is seamless and that your risks are minimised.

EMBRYO DAMAGE

Embryos are volatile and susceptible to damage when they are thawing, and that's where the risk lies. If embryos are not thawed correctly, they can be encumbered by ice shards, and be damaged as a result. On Cloudnine, our advanced technologies are tailored to thaw embryos perfectly, ensuring that their survival rates are optimised.

DEATH OF CELLS

An embryo is made up of tens of cells, and sometimes, the thawing process could destroy some of them. However, a 100-cell embryo can generally withstand such weathering, and still be strong enough to survive inside the uterine cavity.

FROZEN EMBRYO TRANSFER – FET

A frozen embryo transfer, or FET, is a type of IVF treatment where a cryopreserved embryo created in a full IVF cycle is thawed and transferred to a woman's uterus. At Cloudnine, we give the best care and support to women who come in with infertility issues and under the FET treatment. FET helps infertile women to have healthy babies with a low risk.

FEMALE INFERTILITY SPECIALIST

At Cloudnine, we have a comprehensive understanding of family building through assisted reproduction technology. Frozen embryo transfer (FET) technique is one such technique for treating female infertility. Frozen embryo transfer will increase IVF success rate. Our experienced fertility doctors will help you in understanding the procedures and make the process easy.

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