Autologous endometrial coculture biopsy: is timing everything?

Coculture biopsy in the cycle preceding IVF does not increase implantation, clinical pregnancy, or live birth rates compared with biopsies performed more than one cycle before IVF. Previously demonstrated improvements in embryo quality and pregnancy outcomes in patients undergoing IVF with AECC are probably not attributable to biopsy-induced endometrial injury.