Blastocyst Transfer
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What is a blastocyst?
A blastocyst is an embryo transfer which involves transferring one or more embryos that are at blastocyst formation stage of development which advanced stage of an embryo that usually happens on the 4th or 5th day of fertilization. This is then transferred to the uterus of the expecting female. To understand it better, it is important to understand the basic differences between a 3rd, 4th, and 5th-day transfer of an embryo.
Who requires Blastocyst Transfer?
Blastocyst transfer is recommended for couples who have not had success with day-3 embryo transfer or who want to improve selection and implantation potential.
How Does Blastocyst Transfer Work?
Embryos are cultured to day 5 (or 6) when they reach the blastocyst stage—with an inner cell mass (becoming the baby) and trophoblast (becoming the placenta). Transferring at this stage can improve selection and alignment with the uterus.
Blastocyst Transfer Procedure
Blastocyst transfer is part of your IVF cycle:
Ovarian stimulation and egg retrieval
Same as standard IVF; eggs are fertilized in the lab.
Extended culture to day 5–6
Embryos are cultured until they reach blastocyst stage; only viable ones typically develop.
Selection and transfer
One or more blastocysts are selected and transferred into the uterus via catheter.
Pregnancy test
A pregnancy test is done about two weeks after transfer.
Benefits of Blastocyst Transfer
Improves embryo selection (only developing embryos reach blastocyst)
Better synchrony with uterine lining
Option for single embryo transfer with good success
Clinically proven for selected patients
Blastocyst Transfer Success Rate
Blastocyst transfer on day 5–6 can be more successful than day-3 transfer for many couples, especially those with multiple embryos, as it allows better selection and uterine alignment. Success depends on age, embryo quality, and clinic expertise.
Risks and Possible Complications
Risks are similar to standard IVF. Not all embryos reach blastocyst stage, so some cycles may have no transfer if all arrest earlier.
Recovery After Blastocyst Transfer
Recovery is the same as after any embryo transfer: light activity, avoid strenuous exercise, and follow progesterone and medication instructions until the pregnancy test.
Cost of Blastocyst Transfer
Blastocyst transfer is part of IVF cost; extended culture may have a marginal additional cost. Discuss the full cost with our team.