OC16.01: Quantitative analysis of uterine peristalsis for prediction of pregnancy in IVF patients: external validation of the WAVES method. Issue Volume 58:Issue S1(2021)Supplement (14th October 2021) - Rees, C.O.; Huang, Y.; Akhtar, M.; Mischi, M.; Humberstone, A.; Schoot, B.C.