Redefining recurrent implantation failure

The lack of an accurate definition poses potential hazards and may lead to unjustified early diagnosis.
Dr Genia Rozen Associate Professor Alex Polyakov

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.