Success in IVF treatment depend on several factors such as:
- The age of the woman. The younger the women, on average the higher the chance of pregnancy.
- The number and stage of the embryos transferred. Transferring one embryo at a time is safest for mother and child – having twins, doubles or triples many of the risks of pregnancy and childbirth. Sunfert encourages the transfer of one embryo at a time.
- The type of embryo selection, such as Preimplantation Genetic Testing (PGT).
There are also different ways of presenting success rates. Here we use the chance of clinical pregnancy per embryo transfer, because this measure is most widely used in Malaysia and worldwide.
Fresh Embryo Transfer
When people obtain a reasonable number of eggs, it is safer for the mother to freeze all the embryos instead of doing a fresh embryo transfer. Fresh embryo transfer is mainly used for 20% of couples who use mild ovarian stimulation, or who have low response to IVF medications. About 54% of women age 37 and younger have a single embryo transferred.
Frozen Embryo Transfer - Non PGT
At Sunfert, 80% of all embryo transfers use frozen-thawed embryos. For women age 37 and younger, 61% transferred a single embryo for the safety of the mother and baby.
Frozen Embryo Transfer - PGT
PGT maximises the chance of pregnancy by ensuring only embryos with the normal number of chromosomes are transferred.
The results on this page came from Sunfert’s main clinic in Bangsar South from IVF treatments in 2020.
Things to remember when thinking about pregnancy rates
- Not everyone who starts an IVF cycles gets to egg collection – about 5-10% of cycles are stopped because the women has a low response to the IVF medications, and it is better to stop and start again at a higher dose of medications.
- For some couples no mature eggs are collected, the sperm are unable to fertilise the eggs or none of the fertilised eggs develop into an embryo which can be used.
- About half the fertilised eggs are suitable for embryo transfer or freezing.
- PGT doesn’t increase your overall chance of having a baby, but it does prevent couples from transferring poor embryos that reduce the chance of pregnancy.
Your Sunfert doctor will discuss options and the best approach for you, taking into account your age, your ovarian reserve, and any other aspects that are important for you.
Your personal chance of success
It is your personal chance of success per treatment that is important. Here are the major factors:
- The woman’s age at egg collection
- The number of eggs collected
If you are using an egg donor, it is the donor’s age that matters. When using frozen embryos, it is your age when the embryos were created.
Your doctor will advise whether other personal factors may contribute to infertility, thus, affect your chance of success.
The number of eggs you are likely to have in an IVF cycle can be estimated from the level of a hormone called AMH (Anti Mullerian Hormone). Our doctors customise the dose of medications and the type of ovarian stimulation based on your age, AMH level, and other information from your medical history. Having 5-10 eggs gives about twice the chance compared to having 1-2 eggs. However, having more than 10 eggs only adds a small extra benefit.
There can be considerable variation in egg number from one IVF cycle to another in the same women. The number is usually within plus or minus 3. So if you get 8 eggs the first time, you can expect 5 to 11 eggs the next time.
The chance is very similar whether it is your 1st, 2nd or 3rd cycle, unless some major problem or issue shows up in the first cycle.