ISUOG statement on the safe use of Doppler for fetal ultrasound examination in the first 13?+?6?weeks of pregnancy (updated).
ISUOG statement on the safe use of Doppler for fetal ultrasound examination in the first 13?+?6?weeks of pregnancy (updated). Ultrasound Obstet Gynecol. 2021 06; 57(6):1020.