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Table 1 FGR definition in recent literature

From: Early onset fetal growth restriction

Institution / Author

FGR definition

Baschat et al 2007 [101]

Combination of small fetal AC with elevated UA Doppler blood flow resistance

Cochrane 2013 [65]

Failure to reach the growth potential

DIGITAT 2012 [38]

EFW or AC <10th centile for gestational age

ACOG 2013 [40]

Fetuses with EFW <10th centile for gestational age

RCOG 2013 [41]

Small–for–gestational age (SGA) refers to an infant born with a birth weight less than the 10th centile.

Fetal growth restriction (FGR) is not synonymous with SGA.

SOGC 2013 [39]

Intrauterine growth restriction refers to a fetus with a EFW <10th centile on ultrasound that, because of a pathologic process, has not attained its biologically determined growth potential.

PORTO 2013 [6]

EFW < 5th percentile & umbilical artery PI >95th percentile

TRUFFLE 2013 [3]

AC < 10th percentile & umbilical artery PI >95th percentile

Gordijin et al 2016 [43]

AC <3rd centile OR EFW <3rd centile OR AREDF

OR

Both of the following: 1) EFW or AC < 10th centile and 2) UtA PI >95th centile OR UA PI >95th centile.

  1. AC abdominal circumference
  2. AREDF absent/reversed umbilical artery end diastolic flow
  3. EFW estimated fetal weight
  4. PI pulsatility index
  5. UtA uterine artery
  6. UA umbilical artery