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Embryo transfer represents the final stage of the IVF treatment and is the climax of the IVF treatment cycle. How do we decide on which day to transfer your embryos ? Day 2 ? 3 ? 5 ? Which is better ? and why ?
Unfortunately, human reproduction is not a very efficient enterprise. This is true in the bedroom as well as the clinic, and most embryos do not become babies. This is because many embryos have a genetic error ( which is often random) and will not implant, because Nature will prevent them from doing so. This is why the implantation rate even for top quality embryos is about 40%.
So how do we select the top quality embryo to maximize your chances of success ? And how do we decide which day to transfer it ? And how may do we transfer ? All complex questions, which IVF clinics need to deal with daily !
Many clinics which don't have a good lab will transfer embryos on Day 2 or 3. To add insult to injury, they will transfer more embryos into the uterus, in order to maximise the chances of success. This is why their patients end up with multiple pregnancies - an iatrogenic complication of IVF, which increases the risk of babies having birth defects because of premature births !
Embryo Transfer on Day 5
Top Quality Day 5 Embryo
The spare top quality blastocysts can be frozen, and used for the next cycle !