ERA: it is a biopsy of an endometrium followed by finding out a genetic expression of an endometrium to find out the endometrium is

Pre receptive: required more days to transfer

Receptive: Require same days to transfer

Post receptive: require less days to transfer

It decides exact timing for embryo implantation

Still not recommend to all IVF failure. But at WINGS we are doing in selected IVF failure patient.