Embryo Cryopreservation
After IVF you may generate more embryos than you can transfer. These may be suitable for cryopreservation (freezing) and storage for future use. Legally we can store embryos for up to 10 years for your own use. Freezing of embryos can allow you to reduce the number transferred in a fresh cycle, also reducing the multiple pregnancy risk.
The management of frozen embryo transfer (FET) cycles is simpler and cheaper than fresh cycles. IVF stimulation drugs are not required. If the woman has a regular cycle the embryos are transferred in a natural cycle, soon after ovulation. If she does not have ovulatory cycles, or the cycle is irregular or absent, the embryos are transferred in an artificial cycles using hormone replacement therapy to build up the lining of the uterus (womb). In general, 3 out of 4 good quality embryos generally survive the freezing and thawing procedures. However, success rates do depend on the development of your womb lining (endometrium) and on the quality of the embryos frozen. The embryologist will discuss with each patient their individual requirements and advise on the quality of their embryos. This can give an accurate assessment of the likely survival rates.
Both partners will be required to complete various consent forms to allow storage of embryos. The issue of consent is very complicated, so the embryologist will guide you through the form to ensure the necessary paperwork is completed for your individual requirements.
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