Is biochemical pregnancy loss associated with embryo or endometrium? A retrospective cohort study in frozen single embryo transfer of own and donated oocytes

Does the use of preimplantation genetic testing for aneuploidies (PGT-A), personalized embryo transfer with endometrial receptivity assay (pET-ERA), or the use of donated oocytes modify the incidence of biochemical pregnancy loss (BPL) in frozen single embryo transfer (FSET)?