1. P-406 Ongoing pregnancy rates (OPRs) after warmed blastocyst transfer (WBT) in a true-natural cycle (t-NC) are similar using six different luteinizing hormone (LH) surge criteria. (30th June 2022) Authors: Erden, M; Polat, M; Mumusoglu, S; Ozbek, I. Y; Gonca, O.D; Karakoc Sokmensuer, L; Esteves, S; Humaidan, P; Yarali, H Journal: Human reproduction Issue: Volume 37(2022)Supplement 1 Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗