Your specialist gynaecologist will organise a cycle plan for your FET cycle at Fertility North. The specialist may require you to have an appointment with them to discuss this plan prior to commencing your treatment cycle. You will also need to make a booking for an FET cycle, so please check with the Nurse Coordinator in advance. Please telephone Fertility North approximately a fortnight before your cycle to arrange a time to sign consent forms, as we will not thaw any of your embryos without your written consent. One of these consents must be signed for each transfer cycle. It is also necessary for you to pay the appropriate pre-payment before you begin your FET cycle.
The frozen embryo transfer cycle is relatively non-invasive compared to an egg collection cycle. The embryos can be replaced either in a natural cycle or in a controlled medicated cycle. We aim to transfer the embryos into your uterus at the correct time in relation to ovulation and the thickness of the lining of your uterus (endometrium). Often this is done by using ovulatory medication to better time the transfer.
In a “natural” FET cycle (where no medications are used before the embryo transfer), the cycle is tracked for ovulation using blood tests to monitor the hormone levels. As ovulation draws near an ultrasound will be requested to measure the thickness and maturity of the endometrium. If this is suitable, the embryo transfer will be performed 2-3 days after ovulation.
In a “controlled” FET cycle, Progynova (oestrogen) tablets, or small doses of rFSH (Puragon or Gonal-F) are administered in order to prepare the endometrium for implantation. The development of the endometrium is monitored by ultrasound scanning (approximately 1-2 scans). The first ultrasound is usually performed on day 10-12. When the endometrium is thick enough and of the right maturity, a trigger injection is given to better effect ovulation and to change the endometrial receptivity.