At a glance
A mock embryo transfer is a trial run of the real transfer procedure. It helps your doctor map your uterus and plan the exact steps for your actual embryo transfer.
What Is a Mock Embryo Transfer?
A mock embryo transfer (also called a trial transfer or dummy transfer) is a procedure that simulates the steps of a real embryo transfer without actually placing an embryo. It is typically performed before the actual transfer cycle to help the doctor plan the best approach. The mock transfer gives your doctor information about the shape, length, and direction of your cervical canal and uterine cavity, so that the real transfer can be as smooth and precise as possible.
Why Is a Mock Transfer Done?
The main purpose is to increase the chance of a successful real transfer. By doing a trial run, the doctor can:
- Measure the depth of the uterine cavity
- Determine the optimal catheter type and curve
- Identify any obstacles such as cervical stenosis or sharp angles
- Practice the technique to minimize trauma on the day of transfer
This planning can help reduce the risk of difficult transfers, which may affect implantation.
How Is the Procedure Performed?
A mock embryo transfer is usually done in a clinic or hospital setting. It is similar to a pelvic exam and does not require anesthesia. Here is a general step-by-step outline:
- Preparation: You may be asked to have a full bladder, which helps straighten the angle between the cervix and uterus. You lie on an exam table with your feet in stirrups.
- Speculum insertion: The doctor gently inserts a speculum to visualize the cervix.
- Cervical cleaning: The cervix may be cleaned with a sterile solution.
- Catheter insertion: A soft, thin catheter (the same type used for the real transfer) is passed through the cervix into the uterine cavity. The doctor may use ultrasound guidance to see the catheter tip.
- Measurement: The distance from the external cervical os to the uterine fundus (top of the cavity) is measured. This measurement is recorded for the real transfer.
- Removal: The catheter is gently removed. The entire procedure usually takes only a few minutes.
Some clinics may perform a mock transfer during a separate appointment, while others do it on the same day as the real transfer (just before).
Does It Hurt?
Most women experience mild discomfort similar to a Pap smear or menstrual cramp. You may feel a slight pinch or pressure. If you have a sensitive cervix, your doctor can use a very thin catheter or offer a local anesthetic. The procedure is generally well tolerated.
When Is a Mock Transfer Done?
The timing can vary. Common approaches include:
- In a separate cycle: A mock transfer may be performed in the cycle before the actual embryo transfer, often during the luteal phase or at a time that mimics the transfer window.
- On the day of real transfer: Some doctors do a mock transfer immediately before the real one, using the same catheter and technique.
Your clinic will advise the best timing based on your individual treatment plan.
How Does It Help Plan the Real Transfer?
The information from a mock transfer allows the doctor to:
- Choose the correct catheter length and type
- Pre-curve the catheter if needed
- Know exactly how far to insert the catheter
- Avoid touching the uterine fundus, which can cause cramping
- Reduce the number of attempts during the real transfer
This preparation can make the real transfer quicker, less uncomfortable, and potentially more successful.
Questions to Ask Your Clinic
Before your mock transfer, consider asking:
- Will the mock transfer be done in the same cycle as the real transfer or in a separate cycle?
- Do I need a full bladder?
- Will ultrasound be used?
- How long does the procedure take?
- Are there any restrictions after the mock transfer?
- Will the results affect my treatment plan?
Next Steps
If you are preparing for an IVF cycle in Thailand, discuss with your doctor whether a mock embryo transfer is recommended for you. It is a simple, low-risk procedure that can provide valuable information for your real transfer. For more details on the overall IVF process, see our guides on IVF in Thailand and the treatment process. International patients can also refer to our information for international patients for travel and planning tips.
Frequently asked questions
Is a mock embryo transfer necessary for everyone?
Not always. Some doctors perform a mock transfer only if they anticipate difficulty, such as in women with a tilted uterus, cervical scar tissue, or previous difficult transfers. Others do it routinely. Ask your clinic if they recommend it for your case.
Can a mock transfer affect my menstrual cycle?
Generally, no. The procedure is very gentle and does not interfere with your cycle. However, if you have any concerns, discuss them with your doctor.
How much does a mock embryo transfer cost in Thailand?
Costs vary by clinic and whether it is bundled with the IVF package. Contact your clinic directly for a detailed fee schedule.
Will I need to take time off work for a mock transfer?
Most women can resume normal activities immediately. The procedure itself takes only a few minutes, and you can usually go home or back to work right after.
Continue your research
Medical information notice: This article is educational and does not replace individual assessment, diagnosis, genetic counselling or treatment advice from a licensed clinician. Provider services, availability, fees and policies should be verified directly before booking.
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