Embryo transfer places embryos — cultured for 3–5 days after external fertilisation — gently into the uterus.
Throughout the embryo culture phase, our medical team and embryologists closely monitor each embryo to ensure quality. The transfer itself is performed using a specialised catheter inserted through the vagina under ultrasound guidance.
No anaesthesia, sedation or fasting is required, and the procedure is generally painless.
Fresh, or frozen.
01 — Fresh Cycle
The embryo is transferred shortly after egg retrieval and fertilisation, typically at the day-5 blastocyst stage, with the uterine lining prepared by medication.
- ✦Saves time and costs associated with freezing
- ✦Embryo is not affected by freezing and thawing temperatures
02 — Frozen Cycle (FET)
Day-5 embryos are frozen and transferred in a later menstrual cycle, once the body has recovered and the uterine lining is optimally prepared.
- ✦Body has time to recover from ovarian stimulation, benefitting both physical and mental well-being
- ✦Reduces the risk of Ovarian Hyperstimulation Syndrome (OHSS)
- ✦Ideal for couples planning PGT-A genetic screening before transfer
Frozen embryo transfer in Thailand is now the preferred choice.
Fresh transfers save time and cost, but research consistently shows lower pregnancy rates compared with frozen transfers. Ovarian stimulation elevates hormone levels and may affect the quality of the uterine lining, while also increasing the risk of Ovarian Hyperstimulation Syndrome (OHSS).
Frozen transfers allow the body time to recover and open the door to preimplantation genetic testing (PGT-A) for chromosomal screening before transfer.
The final decision rests with your doctor — based on hormone response, embryo quality, the uterine lining and your overall health.
A precise, gentle placement.
Each step is performed by an experienced team to give the embryo its best chance of implantation.
Schedule & Prepare
The doctor schedules the transfer and prepares the uterine lining with supportive medication.
Ultrasound Guidance
Ultrasound is used to identify the optimal location in the uterine cavity.
Catheter Loading
An embryologist carefully loads the selected embryo into a thin transfer catheter.
Embryo Placement
The doctor positions the embryo precisely — no anaesthesia or fasting required.
Rest & Follow Up
A short rest period, then follow-up to confirm implantation with a blood pregnancy test.
Specialist hands, world-class lab.
"Personalised transfer planning, led by Dr. Naruemit Wonglikitpanya and our embryology team."
- ✦Specialist medical team with over 15 years of fertility experience
- ✦Accredited by the Ministry of Public Health, Thailand
- ✦Personalised treatment plans for every couple
Common questions.
Is the embryo transfer procedure painful?
+
The procedure is generally painless, similar to a pelvic exam. No anaesthesia or sedation is required.
Do I need to fast before the transfer?
+
No fasting or dietary restrictions are needed before an embryo transfer.
Which is better — fresh or frozen embryo transfer?
+
Frozen transfers currently show higher pregnancy rates in many cases, but the choice depends on your hormone levels, uterine readiness and overall treatment plan as advised by your doctor.
How many embryos are transferred at once?
+
Usually a single high-quality embryo is transferred, with any remaining embryos frozen for future cycles.
When will I know if the transfer was successful?
+
A blood pregnancy test (Beta-HCG) is performed around 10–14 days after the transfer to confirm results.
Ready to plan your embryo transfer?
Contact Millennium IVF Clinic for a free consultation and personalised guidance on the right transfer cycle for you.