Ultrasonographic Fetal Growth Charts: An Informatic Approach by Quantitative Analysis of the Impact of Ethnicity on Diagnoses Based on a Preliminary Report on Salentinian Population

Table 1

Regression equations for the mean and the standard deviation of AC, BPD, FL, and HC.

Fetal parameter	Regression equations	𝑅^2 (%)
Abdominal circumference (AC)
Mean	2,2783 − 0,07057 GA + 0,05214 GA^2  −  0,0007706 GA^3	94
SD	0,0284 + 0,354 * GA
Biparietal diameter (BPD)
Mean	−0,0377 + 0,10476 GA + 0,012021 GA^2  −  0,0002124 GA^3	98
SD	0,0762 + 0,0042 * GA
Femur length (FL)
Mean	−1,2394 + 0,13735 GA + 0,007537 GA^2  −  0,000132 GA^3	98
SD	0,3186 − 0,0162 * GA + 0,0004 * GA^2	98
Head circumference (HC)
Mean	−9,8027 + 1,4258 GA + 0,006556 GA^2  −  0,0003765 GA^3	98
SD	0,453 + 0,0102 * GA