Embryo Freezing (Embryo Cryopreservation)

Embryo cryopreservation stores embryos created by IVF or ICSI at minus 196 degrees Celsius so that they can be thawed and transferred in a later cycle. Today this is done by vitrification, an ultra-rapid freezing method that avoids ice crystals.

It lets one egg collection yield several transfer attempts, makes single embryo transfer practical and allows transfer to be delayed for medical reasons. A frozen embryo is a chance, not a certainty: pregnancy rates per transfer depend mostly on the woman's age when the eggs were collected.

What Embryo Freezing (Embryo Cryopreservation) involves

After egg collection and fertilisation, embryos are grown in the laboratory for 5 to 6 days to the blastocyst stage. Embryos of suitable quality that are not transferred fresh are graded, and in some cases a few cells are biopsied for genetic testing first. Each embryo is moved through increasing concentrations of cryoprotectant for a few minutes, loaded on a labelled carrier in a tiny droplet and plunged into liquid nitrogen. For a later frozen embryo transfer (FET), the lining of the womb is prepared in a natural cycle tracked by ultrasound or with oestrogen tablets followed by progesterone; the embryo is warmed on the morning of transfer and placed in the uterus through a soft catheter.

Who is a good candidate for Embryo Freezing (Embryo Cryopreservation)?

Freezing is either a by-product of IVF with spare embryos or a deliberate plan.

• Good-quality surplus embryos after a fresh transfer
• A high risk of ovarian hyperstimulation, where a freeze-all cycle is safer
• Embryos awaiting genetic test (PGT) results
• A thin or out-of-phase womb lining, or raised progesterone, in the fresh cycle
• Married couples facing cancer treatment who need fertility preservation

It is usually not the right choice if:

• Single women, who under Turkish rules can freeze eggs for defined reasons but not embryos
• Couples who want donor eggs, donor sperm or surrogacy, none of which is legal in Türkiye
• Poor-quality embryos that are unlikely to survive warming
• Couples who have not agreed what should happen to the embryos on separation or death

Technique options

• Vitrification at blastocyst stage: The current standard; survival after warming is about 95 in 100.
• Freeze-all strategy: No fresh transfer; all embryos are frozen and transferred in a later, calmer cycle.
• Natural-cycle FET: Uses your own ovulation with minimal medication; suits regular cycles.
• Medicated (programmed) FET: Oestrogen and progesterone control timing, which is useful for travellers, though it carries a somewhat higher risk of blood pressure problems in pregnancy.
• Slow freezing: An older method with lower survival, now rarely used.

What happens during your treatment

Freezing happens in the laboratory and you feel nothing. A frozen embryo transfer takes 10 to 15 minutes, needs no anaesthetic and feels similar to a smear test, with a comfortably full bladder to help the ultrasound view. You rest briefly and leave.

Preparing for your trip

For a frozen transfer, monitoring scans can often be done at home and shared, so you may need only 4 to 6 days in the city around the transfer. In Türkiye embryos may be stored for married couples, consent must be renewed every year by both partners, storage beyond 5 years needs ministry approval, and embryos are destroyed on divorce, on the death of either partner or on request.

• Tell the doctor about medication, allergies, pregnancy or breastfeeding, and any history of cold sores, keloid scars or autoimmune disease
• Avoid alcohol, aspirin and anti-inflammatory painkillers for a few days beforehand if your own doctor agrees, to reduce bruising
• Arrive without make-up on the treatment area and avoid sunbeds and strong sun for two weeks before

Recovery and results

Normal activity can resume straight away; bed rest does not improve success. Progesterone support continues until the pregnancy test 9 to 12 days after transfer and, if positive, until about 10 to 12 weeks. Flying home the day after transfer is considered safe.

• Back to everyday activity: None
• When results show: Pregnancy test 9 to 12 days after transfer
• How long they last: Embryos remain viable for many years; legal storage limits apply

Safety, risks and revision policy

Freezing and warming are well established, with a few limitations.

• An embryo failing to survive warming, in about 5 in 100
• No pregnancy despite a good embryo
• Slightly higher rates of large babies and pregnancy-related high blood pressure after medicated frozen cycles
• Multiple pregnancy if more than one embryo is transferred
• Legal destruction of embryos if consent lapses or marital status changes
• Very rare storage tank failure or labelling error; ask about witnessing systems

Every written proposal arranged through Clinic-Y states what the clinic covers if a correction is needed. Ask for it before you book, not after.

Cost of Embryo Freezing (Embryo Cryopreservation) in Türkiye

Clinic-Y does not publish a single price for Embryo Freezing (Embryo Cryopreservation), because the honest figure depends on your case. What moves it:

• Number of embryos and carriers frozen
• Annual storage fees
• Each frozen transfer cycle, including medication and scans
• Genetic testing of embryos, if chosen
• Transport between clinics or countries

Send your photographs or reports and you receive written, all-inclusive proposals from suitable teams, side by side. Reviewing your case is free.

Frequently Asked Questions