Redefining recurrent implantation failure
The lack of an accurate definition poses potential hazards and may lead to unjustified early diagnosis.
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Recurrent (or repeated) implantation failure is an imprecisely defined and disputed clinical disorder that is characterised by failure to achieve pregnancy after repeated embryo transfers.
It can be defined as a failed embryo implantation, where beta-hCG is in the negative range, after a number of embryo transfers.