Frozen embryo transfer (FET) also known as frozen embryo replacement (FER), consists of the thawing of embryos which were frozen during previous IVF or related treatment, and the replacing of them in the uterine cavity at the appropriate time of the menstrual cycle.
It is common during IVF/ICSI treatment for more embryos to be produced than are required at the time. Good quality embryos remaining after the initial embryo transfer can be successfully frozen and stored. It is important to note that about 50% of our patients will have surplus embryos suitable for freezing. The initial maximum duration of storage is 10 years, although this can be extended in certain circumstances. About 85% of embryos survive the freeze/thaw process and maintain their viability. This reduces the need for repeated "fresh" IVF/ICSI cycles with their associated ovarian stimulation and egg retrieval.
The first successful FET cycle was performed in 1983 and many babies have since been born with this technique. No greater risk of abnormalities than that expected from naturally conceived children has been reported. Frozen-thawed embryos may be replaced in a natural cycle (without the use of drugs) or in a cycle controlled by hormonal replacement (HRT cycle).
The replacement (transfer) of frozen embryos can be carried in a "natural" cycle providing the women's menstrual cycle is regular and she is ovulating. In cases where the cycle is irregular or the woman has difficulties coming up to the clinic or she is not ovulating then we prepare the lining of the womb with hormones.
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IMPORTANT INFORMATION ON BLOOD TESTING DUE TO COVID-19
If you are experiencing symptoms associated with COVID-19, e.g. fever, loss of taste or continuous new cough, please DO NOT attend for a blood test.
Click on the map for information about phlebotomy clinics in Coventry. You can book an appointment online at the locations in red.
Please book an appointment before attending for a blood test. Click on the ‘Book Online’ button above. Booking an appointment helps patients, their carers and family members to plan their hospital visit better, helping to reduce clinic waiting times and enabling patients to be seen much more quickly.
Location: Outpatients Department, on the ground floor. Opening hours: 8am-4.45pm, Monday to Friday (excluding bank holidays).
Children under 16 years old will need to book online here.
Please book an appointment before attending for a blood test, click on the ‘Book Online’ button above. Patients from Rugby and the surrounding areas are able to access the Friends Blood Taking Unit at the Hospital of St Cross.
Referrals for blood tests can be from GP's, practice nurses or from hospital consultants. Patients are also able to leave other samples, such as urine, which have been collected at home, at the hospital's Pathology Reception.
Location: Near Brookfield House, just off North Road - map here. Opening hours: The blood taking clinic sessions for adults and children are listed below:
Monday -Friday 7am-4:45pm Appointment only
Wednesday Evening 5pm-7pm Suspended due to COVID
Saturday Morning 7am-10pm Suspended due to COVID
April 2020 NEW - This Clinic is now by appointment. Please book an appointment before attending for a blood test. Click on the ‘Book Online’ button above.
Address: Stoney Stanton Road, Coventry CV1 4FS Location: Access is via the main doors, the Phlebotomy team are in Area A. Opening hours: Monday to Friday (excluding bank holidays). 8am–4.45pm
Glucose Tolerance Test (GTT)
Specialist Tests - There are a small number of specialist tests where blood needs to be taken on a hospital site as the sample must be transferred to the laboratory rapidly for the test to be undertaken. Click here for a list of these specialist tests and to find out more.