Cite

    Tehila Avitan et al.. “Variations from morning to afternoon of middle cerebral and umbilical artery blood flow, and fetal heart rate variability, and fetal characteristics in the normally developing fetus.” Journal of clinical ultrasound, vol. 46, no. 4, 2018, pp. 235–240. http://access.bl.uk/ark:/81055/vdc_100059740671.0x000043