Does freeze‐all policy affect IVF outcome in poor ovarian responders?

ABSTRACT Objective To evaluate whether the freeze‐all strategy affects in‐vitro fertilization (IVF) outcome in poor ovarian responders (POR) defined according to the Bologna criteria. Method This was a retrospective cohort study of patients undergoing IVF treatment between January 2012 and December 2016 at a single center. A total of 433 POR (as defined by the Bologna criteria) fulfilled criteria and were included in the study; of these, 277 patients underwent fresh embryo transfer (ET) and 156 followed the freeze‐all policy. All patients underwent controlled ovarian stimulation (COS) following a gonadotropin‐releasing hormone antagonist protocol, and cleavage‐stage ET. Main outcome measure was ongoing pregnancy rate. Secondary outcomes included implantation and clinical pregnancy rates. The freeze‐all strategy was implemented when the progesterone serum level was > 1.5 ng/mL or the endometrium was