Reduced placental oxygenation during subclinical uterine contractions as assessed by BOLD MRI  Marianne Sinding, David A. Peters, Jens B. Frøkjær, Ole B. Christiansen, Niels Uldbjerg, Anne Sørensen  Placenta  Volume 39, Pages 16-20 (March 2016) DOI: 10.1016/j.placenta.2015.12.018 Copyright © 2016 Elsevier Ltd Terms and Conditions

Fig. 1 Slice placements. To the left: slices used for the assessment of placental area, placental BOLD signal and uterine area (remaining slices not demonstrated). To the right: examples of ROIs onto BOLD MR images: a) placental area ROI, b) placental BOLD signal ROI, c) uterine area ROI. Placenta 2016 39, 16-20DOI: (10.1016/j.placenta.2015.12.018) Copyright © 2016 Elsevier Ltd Terms and Conditions

Fig. 2 Placental BOLD signal during uterine contraction; a) relaxation b) contraction. Placenta marked with white arrows. Placenta 2016 39, 16-20DOI: (10.1016/j.placenta.2015.12.018) Copyright © 2016 Elsevier Ltd Terms and Conditions

Fig. 3 Temporal association between measurements during one uterine contraction: Normalized number of pixels in uterine ROI (black), number of pixels in placental ROI (dark grey) and the normalized placental BOLD signal (light grey). Placenta 2016 39, 16-20DOI: (10.1016/j.placenta.2015.12.018) Copyright © 2016 Elsevier Ltd Terms and Conditions