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. Author manuscript; available in PMC: 2015 Aug 10.
Published in final edited form as: J Matern Fetal Neonatal Med. 2013 Sep 12;27(6):543–551. doi: 10.3109/14767058.2013.833904

Table 5.

PERCENT DEVIATIONS

Parameter
Fetus N
% Deviations (28–38 wks, MA).
Fetus N
% Deviations (3rd trimester).
Number of Fetuses
N
Expected Value
2 SD
N
Percent Deviations1
mean range mean range p mean p 95%
% % % % % %
BPD 117 400 0.5 0.6 to −0.7 6.8 7.7 to 6.5 20 97 0.3 +/− 7.0
HC 117 400 0.1 0.5 to −0.3 5.7 6.8 to 5.2 20 99 0.9 +/− 6.0
AC 118 404 −0.4 −0.1 to −0.7 7.5 8.4 to 7.1 20 99 −0.1 +/− 7.0
FDL 118 401 0.1 0.3 to −0.2 8.1 9.6 to 7.4 20 99 −0.1 +/− 7.0
ThC 113 388 − 0.0 0.0 to −0.1 9.7 10.7 to 9.1 30 116 −0.0 +/− 7.4
EWT 117 400 −0.2 0.7 to −0.1 20.0 23.3 to 17.8 20 99 0.6 +/− 15.0
HDL 118 402 0.1 0.2 to −0.1 6.9 8.3 to 6.2 22 72 −0.1 +/− 6.8
ArmC 118 402 0.0 0.5 to −0.5 10.9 12.5 to 10.2 22 72 0.5 +/− 9.2
Avol 118 402 0.5 1.7 to −0.8 24.3 29.0 to 22.2 22 72 0.4 +/− 17.0
Tvol 118 403 −0.1 1.9 to −2.2 20.8 25.7 to 18.0 22 72 −0.5 +/− 15.0
1

Data previously published in References 9,10,14,15,25,28

n: number of % Deviation values;

Expected Value: age-specific value derived from function relating % Deviation to fetal age:

2 SD: age-specific variance;

m: mean of set of 11 weekly expected values:

range: maximum and minimum values for the set of 11 weekly variances;

pm: previously published mean value: p95%: previously published 95% range.