Embryo freezing, or embryo cryopreservation, is the process of fertilising retrieved eggs with sperm in our laboratory to create embryos, which are then frozen using advanced vitrification technology and stored for future use. This is most commonly performed after a fresh IVF cycle when more high-quality embryos are created than can be transferred in a single cycle.
Frozen embryo transfer (FET) cycles are a highly effective and cost-efficient way to attempt additional pregnancies without repeating the full ovarian stimulation process. Studies consistently show that FET success rates are comparable to — and in many cases higher than — fresh embryo transfers, largely because the uterus can be better prepared in a FET cycle.
Embryo freezing is also used for patients who need to delay their transfer for medical reasons, those undergoing preimplantation genetic testing (PGT), cancer patients preserving embryos before treatment, and couples who wish to have additional children in the future using embryos created from a current IVF cycle.
Our embryology team uses gold-standard vitrification protocols to ensure every frozen embryo retains its full developmental potential, giving you the best chance of success in future transfer cycles.
Our vitrification process achieves embryo survival rates above 95% after thawing. Every embryo is individually assessed and graded before freezing, and only the highest-quality embryos are selected for storage.
Embryos frozen with us can undergo preimplantation genetic testing (PGT-A or PGT-M) before transfer. Biopsied embryos are frozen while awaiting results, then transferred in a subsequent FET cycle once the genetic report is confirmed.
Our secure cryogenic storage facility operates 24 hours a day, 7 days a week, with continuous liquid nitrogen monitoring and multiple redundant safety systems. Your embryos are stored under the highest international safety standards, and you will receive annual storage statements confirming their status.
Embryo freezing fits naturally into your IVF journey. Here is how the process works — from embryo creation through to a future frozen embryo transfer cycle.
Eggs and sperm are combined in the lab. Embryos are cultured to the blastocyst stage (Day 5–6) before grading
High-quality embryos are flash-frozen and stored securely. Optional PGT testing can be completed before freezing.
When you are ready, your uterus is prepared with medication and the embryo is thawed and transferred in a simple procedure.
Whether you are freezing surplus embryos after IVF or planning a future family, our team provides clear guidance, secure storage, and full support through every future transfer cycle.
Our embryologists will explain the grading of your frozen embryos in plain language, so you understand exactly what you have in storage and what your realistic chances are for each future transfer cycle.
When you are ready to proceed with a frozen embryo transfer, our specialists design a personalised uterine preparation protocol to optimise your endometrial lining, giving the transferred embryo the best possible environment for implantation.
We maintain a complete record of your frozen embryos and send you annual storage confirmations. When you are ready for a FET cycle, we walk you through the full process — medication, monitoring, transfer, and two-week wait — with a clear, written schedule.
No. Vitrification is an ultra-rapid freezing method that prevents ice crystal formation, which is the main cause of cell damage in older slow-freeze methods. With vitrification, embryo survival rates after thawing exceed 95%, and the developmental potential of frozen-thawed embryos is equivalent to fresh embryos of the same grade.
Yes — and in many cases, FET success rates are actually higher than fresh transfers. This is because the uterus can be more carefully prepared in a FET cycle, free from the hormonal effects of ovarian stimulation. Our FET programme includes personalised endometrial preparation protocols to maximise your chances of implantation.
Schedule a consultation with our fertility experts and take the first step toward your parenthood journey.
Schedule a consultation with our fertility experts and take the first step toward your parenthood journey.
Schedule a consultation with our fertility experts and take the first step toward your parenthood journey.
Book your consultation with our fertility experts the first step toward your parenthood journey.
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