IVF

The Frozen Embryo Replacement Cycle

Unlike IVF or ICSI a Frozen Embryo replacement cycle does not require the ovaries to be stimulated. Instead Oestrogen is administered, normally in tablet or patch form. This enables the uterine lining to develop for the embryo’s to be replaced. Vaginal scans will also be performed to check that the lining is thickening as result of the Oestrogen theraphy. When the lining has reached approximately 8mm in thickness, the replacement of the embryos will be scheduled. The unit will then advise the woman when to commence Progesterone which will help to maintain the uterine lining. Both Oestrogen and Progesterone are continued until the pregnancy test 14 days after embryo transfer.

Uterine Lining

It is on the day of the embryo replacement that the embryologists will thaw the embryos for the transfer. In some cases, not all of the embryos cryopreserved will thaw successfully.

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