Frozen Embryo Transfer Treatment

Frozen Embryo Transfer Treatment at a Private Fertility Clinic in London


What is frozen embryo transfer treatment?

A frozen embryo transfer (FET) cycle is a process to help you become pregnant. FET uses embryos (fertilized eggs) that have been frozen following IVF treatment.

What happens during frozen embryo transfer?

During the FET cycle, your embryos are thawed and placed into your uterus. This is done at a time in your menstrual cycle that best supports a pregnancy. You will be given hormones to help your endometrium (lining of your uterus) accept the embryos. Alternatively, this can also be done sync with your natural cycle.

Meet Dr Irfana Koita

Our Medical Director Dr Irfana Koita takes the time to get to know her patients and their specific needs. This personal attention by the physician is the number 1 rule of our clinic.

Dr Koita is a fellow of the prestigious Royal College of Obstetricians and Gynaecologists (FRCOG) and trained in Assisted Conception at Kings College Hospital, London. She has also done a Masters in Healthcare Leadership from Cornell University, USA. With over 18 years of clinical experience, she’s recognised nationally as an expert in her field.

Do you have embryos in storage at another clinic? We can take over your care

Best doctor she knows what she doing. I’m now 8 weeks pregnant thank you so much for everything.

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If you would like to find out more about frozen embryo transfer or any other of our fertility treatments, get in touch with our team today.

We offer free 10-minute advisory consultations to anyone looking to explore their fertility options. This free call is the perfect opportunity to ask any questions you may have and gain confidence in making the right decision regarding your fertility options. 


The FET process is relatively simple, and can be performed in a natural cycle, without the use of medication, or in a medicated cycle.

The process starts with a consultation and some scans to ensure that your body is ready to begin. As the embryo already exists, this treatment does not involve stimulation of the ovaries or egg collection.

Two weeks before your period is due to start, you’ll need to come into the clinic and discuss your treatment plan with one of our nurses. Once your treatment starts you will have a few ultrasound scans to check when your uterus is ready for the transfer. 

The embryo needs to be thawed before it can be implanted, and will be done so on the day of the transfer. It is then implanted in the uterus using a soft catheter and under ultrasound guidance.

The procedure doesn’t require you to go under any anaesthesia, as it shouldn’t be too uncomfortable for you. 

When you have a FET, there are two options: a natural cycle FET and a medication-controlled FET.  

Natural cycle FET

In a natural cycle FET, your uterine walls will be left to thicken naturally as they would during your regular menstrual cycle. We will check on your cycle and the thickness of your uterus through ultrasound scans so that we know when to trigger ovulation. 

Once ovulation has been triggered, the embryo transfer will be completed around one week afterwards. You may be offered progesterone during the second half of your cycle, but this will depend on your personal treatment plan. 

Medication-controlled FET

Most FET procedures are medication controlled. This may also be offered if your cycle isn’t very regular, as it allows us to time the embryo transfer more accurately. 

Hormones will be used to enable your uterus to develop in thickness when needed, and we’ll check it regularly through ultrasound scans. Once the uterus is at the right thickness, then we can start the second part of your hormone medication and complete the FET about one week afterwards. 

The medication-controlled FET shouldn’t take you any longer than a natural cycle, but it will depend on how quickly your uterus thickens. 

Please refer to our Treatment Prices section for further information.

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