Medical Review: Dr. Deepa Rekha Koduru, Fertility Specialist (MBBS, DGO, DRM, MRM; Reg. No. 54076) | Reviewed: 19 October 2026
Educational Disclaimer: This article is intended for general educational purposes only and should not replace an individual consultation with a qualified fertility specialist.
What a frozen embryo transfer is
During an IVF or ICSI cycle, eggs are collected, fertilised in the laboratory and the embryos are cultured for a few days. Sometimes an embryo is transferred into the uterus in the same cycle; this is called a fresh transfer. At other times, suitable embryos are frozen (vitrified) and transferred in a later cycle. That later step is a frozen embryo transfer, often shortened to FET.
An FET does not need another round of stimulation injections or another egg collection, because the embryos already exist. For how embryos are stored at our centre, see embryo freezing, and for the full journey, see the IVF process step by step.
Why embryos are sometimes frozen first
Your fertility team may suggest freezing embryos and transferring later for reasons such as:
- There are more suitable embryos than will be transferred, so the extra ones are kept for possible future use
- The body needs time to recover after ovarian stimulation
- The uterine lining or hormone levels are not ideal in the stimulation cycle
- Genetic testing of embryos has been planned and results are awaited (see PGT genetic testing)
- Medical, work or family timing makes a later transfer more practical
Which embryos are suitable to freeze is decided by the embryology team. Our guide to embryo grading explains how embryos are assessed in plain language.
How the uterus is prepared
The aim of preparation is to time the transfer for when the uterine lining is ready. Broadly, there are two approaches your doctor may discuss:
- Natural-cycle FET: for people with regular ovulation, the transfer is timed to their own cycle, using ultrasound scans and sometimes blood tests to track ovulation.
- Medicated (hormone-prepared) FET: oestrogen is used to build the lining, and progesterone is added before transfer. This allows the transfer date to be planned and is often used when cycles are irregular.
In both approaches, ultrasound scans check the lining before a transfer date is fixed. If the lining is not ready, the team may adjust medicines or postpone the transfer. The approach is chosen individually; neither is right for everyone.
What happens on transfer day
- The embryo is thawed (warmed) in the laboratory, and the embryologist checks it before transfer
- You may be asked to come with a comfortably full bladder, which helps with ultrasound guidance
- A thin, soft catheter carrying the embryo is passed gently through the cervix and the embryo is placed in the uterus
- The procedure usually takes only a few minutes and does not normally need anaesthesia
- You can usually go home the same day with instructions on medicines and activity
Occasionally an embryo may not survive thawing. If that happens, your team will explain the options with you.
After the transfer
If hormone support has been prescribed, it is important to continue it exactly as advised until your team tells you otherwise. A blood pregnancy test is usually arranged around two weeks after transfer. The waiting days can be hard; our article on the two-week wait covers what is normal and when to call the clinic.
A frozen embryo transfer preserves an option for treatment; it cannot guarantee a pregnancy. Outcomes depend on many individual factors, including age at the time the eggs were collected and the embryos available.
Questions to ask before your FET in Kompally
- Why is a frozen transfer being suggested for me rather than a fresh one?
- Will my transfer be in a natural cycle or a medicated cycle, and why?
- How many scans or blood tests will I need before the date is fixed?
- How many embryos do I have stored, and what are the storage and consent arrangements?
- Which medicines should I continue after transfer, and for how long?
Dr. Deepa Rekha Koduru leads fertility care at Sree Nandaka IVF; see her profile on Dr. Deepa Rekha Koduru. For an overview of treatment at our centre, see IVF treatment in Kompally.
- Address: Plot 770, Jayabheri Park, Kompally, Hyderabad
- Phone: 7672001080
- WhatsApp: 7672001080
- Email: sreenandakafertility@gmail.com
Frequently Asked Questions
What is a frozen embryo transfer?
It is the step in which an embryo that was frozen after an IVF or ICSI cycle is thawed and placed into the uterus, usually in a later cycle. It does not need another egg collection.
Why might embryos be frozen instead of transferred fresh?
Common reasons include keeping extra suitable embryos for later, giving the body time to recover after stimulation, a uterine lining that is not ready, waiting for genetic test results, or personal and medical timing. Your specialist will explain the reason in your case.
Is a frozen embryo transfer painful?
The transfer itself is usually quick and is often compared to a speculum examination. Most people do not need anaesthesia. Your team will explain how to prepare, including whether a comfortably full bladder is needed.
Do I need medicines for a frozen embryo transfer?
It depends on the approach. Some transfers are timed to a natural cycle with monitoring, while others use hormone medicines such as oestrogen and progesterone to prepare the lining. Your doctor will advise which suits you.
When can I take a pregnancy test after FET?
Your clinic will give you a date for a blood test, usually around two weeks after transfer. Testing earlier at home can give misleading results.
Conclusion
A frozen embryo transfer lets embryos created in an earlier IVF or ICSI cycle be used later, with the uterus prepared for the best timing in your situation. If you have embryos stored or have been advised a freeze-all approach, the team at Sree Nandaka IVF can explain the preparation, the day itself and the follow-up in plain language.
Medical Disclaimer: This article is for educational purposes only and should not replace medical advice from a qualified fertility specialist. Recommendations vary according to age, medical history, examination findings and investigation results. No success rates or outcome guarantees are stated or implied.
