Patients are extremely frustrated when the doctor transfers a top quality blastocyst to the uterus and it fails to implant. They either think that they did something wrong – or the doctor did something wrong.However, the reality is that most embryos don’t implant. Yes, there is a lot of embryonic wastage in an IVF cycle, that’s true.But we need to remember there’s a lot of embryonic wastage even in the bedroom, because human reproduction is not very efficient.
After all, this is the reason why every fertile couple doesn’t get pregnant every month they have sex ! Even though she ovulates and the sperms reach the egg , the embryos which form are not genetically competent enough to be able to implant and become a healthy baby.
This is nature’s defense mechanism, to prevent the birth of abnormal babies.
This is one of the biological limitations which we need to deal with even when we’re doing IVF, because in-vivo human implantation is still the final stumbling block.
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