1. P–663 The ratio of serum progesterone (P4) to the number of follicles (P4/Follicle) is a more objective parameter for euploidy rate as compared to systemic progesterone. (6th August 2021) Authors: Ab. ali, K; Lawrenz, B; Tegedor, A L; Ruiz, F R; El-Damen, A; Khatib, I. E; Fatemi, H; Munck, N. D Journal: Human reproduction Issue: Volume 36:Supplement 1(2021) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗