Frozen Thawed Embryo Replacement

Many stimulated cycles result in surplus embryos after embryo transfer. Good quality embryos at day 5-6 after egg collection can be vitrified (frozen) for future use. These embryos can be transferred in a later frozen cycle.  This is often performed when a fresh embryo transfer has been unsuccessful or for the creation of siblings in the future. Occasionally, we may advise that all suitable embryos should be frozen before embryo transfer such as when having PGD/PGS, when there is a risk of severe ovarian hyperstimulation (OHSS) or any other complication, and when the chances of implantation are deemed to be poor but could be improved in the future.

Women with regular cycles and no ovulation dysfunction


Women with irregular cycles or with ovulation dysfunction

Frozen Thawed Embryo Replacement cycles can be done in a natural cycle. Your cycle will be monitored closely to determine the exact day of ovulation and embryos will be transferred 3-5 days after ovulation.   Frozen Thawed Embryo Replacement are carried out after medicated endometrial preparation or after a cycle of ovulation induction. 

The results with vitrified embryos are excellent and appear to be similar (and some claim better) to the results with fresh embryo transfer. 

your journey

& Appointment Booking

Enquiry/Appointment Booking

Patients with previous tests or treatments are advised to arrange for copies to bring with them for their first appointment


Initial Consultation
with a Doctor

Initial Consultation with a Doctor
1 week

When you attend for your Initial Consultation the Fertility Specialist will discuss your previous medical and fertility history and review any previous investigations or treatments, as applicable. The Fertility Specialist may request further investigations and recommend on treatment options.


& Nurse Consultation

Follow-up, Nurse and Embryology
Same day - 1 week

You may require a follow-up appointment with the Fertility Specialist to discuss your results and finalise your treatment. Before your treatment cycle can commence you and your partner, as applicable, will need to attend for a Nurse Consultation with a Fertility Nurse. The nurse will ensure that you understand the individual steps and timeline, discuss medication and its application (where applicable), sign consents (where applicable), perform mandatory virology screening (blood and urine, where applicable) and also answer any questions. You will also have the opportunity to meet with an embryologist to discuss available laboratory services and their potential benefit they may have for your treatment.


Start of your

Start of your treatment
Approximately 14 days

You will attend the clinic for monitoring ultrasound scans, usually one to three 30 min appointments, you may also be asked to have some blood tests. At these appointments you will be continually informed on your progress and instructed on your next step.



Embryo Transfer
1 day

Embryologists will thaw your frozen embryos on the day of your Embryo Transfer and you will have the procedure on the same day.


blood test

Pregnancy blood test
2 weeks

Attend the clinic for your pregnancy blood test


confirmation scan

Pregnancy confirmation scan
2 to 3 weeks

Attend the clinic for your pregnancy confirmation scan


We know that cost is usually a concern when patients are considering treatments. We aim to be as transparent and helpful as possible and you can download a Costed Treatment Plan (CTP) document below listing all charges likely associated with this treatment. There may be additional service charges should your particular case need them and these would be discussed with you based on your individualised treatment plan prior to you starting a treatment.

Download CTP

Book Appointment


If you would like to speak to someone call us on

+44 020 8209 3226

You can use our Contact Us Form and one of our administrators will be in touch.

Contact Form

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