Hystero-embryoscopy as a tool for RPL immunological research at the maternal-fetal interface

An abnormal immune response at the fetal-maternal interface is expected in 50–60 % of unexplained Recurrent Pregnancy Loss (uRPL) cases. Detected immunophenotypes in uRPL could help in risk assessment, prognosis and therapy. The study of immune mechanisms at the fetal-maternal interface is crucial, but the technique used for research has limitations, including contamination and invasiveness, which can trigger immune responses. Hystero-embryoscopy may provide a precise method for studying the immunological factors involved in RPL at the maternal-fetal interface, reducing bias from sample collection techniques. Our aim is to assess its effectiveness in obtaining high-quality samples to study the immunological basis of RPL.