Autologous platelet-rich plasma infusion does not improve pregnancy outcomes in frozen embryo transfer cycles in women with history of repeated implantation failure without thin endometrium.

Aim: The effect of intrauterine infusion of platelet-rich plasma (PRP) which has been shown to improve the pregnancy outcomes in patients suffering from repeated implantation failure (RIF), is intended to be studied in patients with normal endometrial thickness.

Methods: We recruited 85 patients with RIF and normal endometrial thickness (≥7 mm). After obtaining their consent, they were stratified into the intervention (PRP) and control groups, according to the patient's decision.