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. 2012 Aug 28;63(1):32–36. doi: 10.1007/s13224-012-0239-4

Table 1.

Mean, 5th, 50th, and 95th percentiles for the mean uterine artery pulsatility index (Ut.API) between 22 and 24 + 6 weeks of gestation

PI
Week Mean SD 5th percentile 50th percentile 95th percentile n
22 0.80 0.22 0.56 0.74 1.27 62
23 0.70 0.19 0.43 0.66 1.13 75
24 0.75 0.21 0.42 0.71 1.11 63