“CO41 | Failure in assisted reproductive techniques: insights from the first registry: E. Grandone1,3,4, C. Lodigiani2, D. Colaizzo3, M. Passaretti2, J. Khizroeva4, A. De Laurenzo3, P. Totaro5, E. Bucherini6, D. Baldini7, V. Bitsadze4, A. Makatsarya4, M. Mastroianno3, G. Piazza8, M. Othman9, M. Margaglione1 | 1University of Foggia, Italy; 2Humanitas University, Rozzano, Italy; 3IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy; 4First Sechenov University, Russia; 5Santa Maria Hospital, Bari, Italy; 6Angiologia, Faenza, Italy; 7Momo Fertilife, Bisceglie, Italy; 8Brigham Women Hospital, USA; 9Queen’s University, Kingston, Canada” (2025) Bleeding, Thrombosis and Vascular Biology, 4(s1). doi:10.4081/btvb.2025.310.