VP37.09: Sequential analysis of uterine artery Doppler waveform in women at high‐risk of pre‐eclampsia undergoing low‐dose aspirin prophylaxis. Issue Volume 58:Issue S1(2021)Supplement (14th October 2021) - Vinogradov, R.; Smith, V.J.; Murphy, P.; Cherlin, S.; Robson, S.C.