Embryo to Blastocyst
After the IVF/ICSI is done inside the IVF laboratory where the Wife oocyte injected with Husband sperm, it is kept in a dish along with the fluids (food for cells) inside an incubator (a machine which mimics the womb temperature & environment) generally the oocyte fused with sperm is kept for 2 to 3 days and in this time span it develops into an embryo and the same is transferred to the womb.
But in blastocyst culture the embryo is kept for 5 days inside the incubator along with fluids (food for embryo) & some intervention from the embryologist & it develops into a blastocyst.
Blastocyst formation depends upon various conditions, but mainly it depends upon laboratory quality conditions. A good quality laboratory will form a viable & healthy blastocyst. A blastocyst has much higher chance of survival & implantation inside the womb and better chance of achieving pregnancy.
Frequently Asked Questions
1. Is blastocyst transfer better than day 2 or 3 embryo transfer?
Yes research has proven than chances of getting pregnant with blastocyst transfer are better than day 2 or day 3 embryo transfer. A blastocyst is advance form of embryo which is formed after Day 5, a blastocyst is much stronger than an embryo thus a blastocyst has a better chance of survival & getting implanted as compared to an embryo, which in turns translates to better pregnancy chances.
2. Can the doctors transfer multiple blastocysts which will increase the chances of pregnancy?
NO, Transferring multiple blastocyst has a grave risk of multiple pregnancy like triplets or quadruplets which is very risky for the mother, thus for young patients most doctors prefer transferring only one embryo. For older patients above 40 & in some exceptional conditions he Doctor & the Embryologist may take a call of transferring 2 embryo or blastocyst but such scenarios are on case to case basis & very rare.