OP04.09: Umbilical artery and middle cerebral artery Doppler abnormalities during fetal myelomeningocele repair: drug‐induced waveform changes?. Issue Volume 58:Issue S1(2021)Supplement (14th October 2021) - Gonser, M.; Vonzun, L.; Moehrlen, U.; Mazzone, L.; Meuli, M.; Kandler, L.; Krähenmann, F.; Zimmermann, R.; Ochsenbein‐Koelble, N.