- How we decide on which day to transfer your embryos
- 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 1 ? Day 2 ? 3 ? 5 ? Which is better ? and why ?
Uterine Embryo Transfer
- This is the standard procedure. In this procedure, the Embryos are directly transferred into the uterine cavity.
- The procedure usually does not need Anaesthesia.
- Number of embryos to transfer is decided considering the day on which the transfer is performed.
On which day post icsi/ivf, can we perform embryo transfer ?
How do we decide on which day to transfer your embryos back to the uterus?
- Number of Follicles developed during superovulation:
- Number of eggs retrieved after Vaginal Egg Collection
- Total number of Mature Eggs (MII) injected
- Number of Eggs fertilized (i.e. Eggs with 2 pronuclei in them)
- Day 2 transfer can be considered for all patients.
- Need to have at least 6 embryos on Day 1 to consider transferring embryos on Day 3
- High number of Supernumerary Embryos can be frozen after transferring the best embryos into your uterus.
- Only 40 % Embryos make it to Day 5. This means patients with few eggs and those with a low fertilization rate cannot be considered for Day 5 Embryo Transfer.
- Low Freezing rate for supernumerary embryos as all Embryos don’t turn out to be top quality on Day 5.
Unfortunately, human reproduction is not a very efficient enterprise. 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%.
We are very flexible on the day of embryo transfer to increase our chances of success.
Generally embryos are transferred on Day 2, Day 3 and Day 5 post ICSI / IVF. Remember that day of egg collection is Day 0.
There are multiple variables which we consider while deciding when to transfer your embryos back to your uterus.