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. 2021 Jun 17;16(6):e0253306. doi: 10.1371/journal.pone.0253306

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© 2021 Stenning et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 7 — Mean blood flows in the umbilical vein (UV; open circles) and umbilical artery (UA; closed squares) measured immediately before (A) and during (B) consecutive uterine contractions before and after ventilation onset. Both UV and UA flow significantly decreased with increasing contraction number during (p<0.0001 and p = 0.015, respectively) between (p = 0.0001 and p = 0.001, respectively) contractions (C) The percentage reduction in UV flow during a uterine contraction was significantly greater (p<0.0001) after ventilation onset (grey bar) compared to before ventilation onset (black bar).