How many embryos to transfer in IVF is a very common doubt for couples who want to start their treatment. The number of embryos chosen for transfer can affect the chances of pregnancy and the risks, such as having twins or triplets. There are many people who think that transferring more embryos will make IVF more successful. However, this decision is not the same for everyone.
In this blog, we will mention everything about how many embryos to transfer in IVF. We will also include how doctors decide the right number, what factors are considered, the advantages and disadvantages of single or multiple embryo transfers, and more. This will help you to understand the process better and make better choices during your fertility journey.
What Does Embryo Transfer Mean in IVF?
Embryo transfer is one of the most important steps in the IVF process. The eggs are collected from the woman and fertilized with sperm in the lab and they develop into embryos. Out of these, the healthiest embryos are carefully chosen.
Embryo transfer means to place one or more of these embryos directly into the woman’s uterus by using a thin and flexible tube. The main goal is for the embryo to attach itself to the uterine lining and start a pregnancy. This step is simple, painless for most women, and it is usually done without anesthesia.
Why the Number of Embryos Matters?
How many embryos to transfer in IVF is an important decision because it can directly affect the chances of pregnancy and the risks involved. Transferring more than one embryo may increase the chances of pregnancy. However, it can also have the possibility of twins or multiple pregnancies and this can have some health risks for the mother and babies.
On the other hand, transferring just one embryo lowers the chance of multiple pregnancies but may reduce the overall success rate. That’s why doctors carefully study the woman’s age, medical history, and embryo quality before deciding how many embryos to transfer.
Single Embryo Transfer (SET): What It Means
Single Embryo Transfer (SET) means that during the IVF process, only one embryo is placed into the woman’s uterus. This method is becoming more common because it lowers the chances of a multiple pregnancy (like twins or triplets), which can sometimes bring health risks for the mother and babies.
In SET, doctors usually choose the best-quality embryo for transfer and it is based on its growth and development. The remaining healthy embryos, if any, can be safely frozen for future use. This way, couples still have more chances to try again without going through the entire IVF cycle from the start. SET is often suggested for women who are younger, have good-quality embryos, or are going through their first IVF attempt.
Multiple Embryo Transfer: Pros and Cons
Multiple embryo transfer means to place two or more embryos into the uterus during IVF. There are some couples who choose this option to increase the chance of pregnancy in a single cycle but it also has some risks.
Pros:
- Higher chance of pregnancy per cycle – The chances of at least one implanting can be better because more than one embryo is placed.
- This is useful for older women or poor embryo quality – In such cases, transferring multiple embryos may improve success rates.
- It can reduce the need for repeat cycles – If successful, couples may not have to go through another round of IVF immediately.
Cons:
- Risk of multiple pregnancy – Twins or triplets are more likely and this can lead to complications for the mother and babies (like premature birth or low birth weight).
- Increased medical risks – Higher risk of gestational diabetes, high blood pressure, or delivery complications.
- Emotional and financial stress – Managing multiple babies at once can be difficult for families.
Factors That Decide How Many Embryos To Transfer
The decision of how many embryos to transfer in IVF depends on many things. Doctors check every couple’s health and situation before giving any advice. Here are the main factors that are considered:
- Age of the woman – Younger women usually need fewer embryos and older women may need more.
- Embryo quality – Strong and healthy embryos increase the chances with fewer transfers.
- Previous IVF attempts – If IVF failed earlier then doctors may suggest more embryos.
- Medical history – Health issues like miscarriages or fertility problems can also affect the choice.
- Risk of multiple pregnancy – Carrying twins or triplets can be risky, so fewer embryos may be safer.
- Doctor’s guidance – Final decision is always made with medical advice and the couple’s individual preference.
Risks of Transferring Too Many Embryos
Putting too many embryos during IVF can increase the chance of pregnancy but it also has some serious risks. The mother may face health problems and babies may not grow safely. Some common risks include the following:
- Multiple pregnancy (twins or more)
- Early delivery (preterm birth)
- Babies born with low weight
- Health issues for the mother like high blood pressure or diabetes
- Higher chance of miscarriage
- Babies needing special care in NICU
Final Words
How many embryos to transfer in IVF is an important decision that should always be made with the advice of your doctor. In this blog, we have explained the factors that affect this choice and the risks of transferring too many embryos. Proper guidance, good medical care, and a healthy lifestyle can help to improve the chances of a safe and successful pregnancy.
At Risaa IVF, Dr. Rita Bakshi, our Senior IVF Specialist and Gynecologist, provides advanced treatments and personalized care for couples who are trying to conceive. If you would like to know more or consult our team, you can email us at doctor@risaaivf.com or call us at 95555 44421 / 22 / 23. We are always here to guide and support you on your journey.
Frequently Asked Questions (FAQs)
Can embryos be saved for later?
Yes, extra healthy embryos can be frozen and used in future IVF cycles.
Is single embryo transfer common?
Yes, especially when the embryo quality is good. Many doctors now prefer single embryo transfer to reduce risks while keeping success rates high.
Who decides how many embryos to transfer?
The decision is made after discussing with your fertility doctor, considering your age, medical history, and treatment goals.
How is embryo quality checked?
Embryologists grade embryos based on their development and appearance under a microscope before transfer.