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US and ISUOG diagnostic criteria for fetal growth restriction

US and ISUOG diagnostic criteria for fetal growth restriction
SMFM-ACOG-AIUM ISUOG
Early (<32 weeks) Late (≥32 weeks)
AC or EFW <10th centile for GA AC or EFW <3rd centile for GA or UA-AEDF AC or EFW <3rd centile for GA
Or Or

AC or EFW <10th centile

Combined with one of the following:
  1. Uterine artery PI >95th centile
  2. UA-PI >95th centile
 Any two of the following:
  1. AC or EFW <10th centile for GA
  2. AC/EFW crossing centiles >2 quartiles on growth centiles
  3. CPR <5th centile or UA-PI >95th centile
These criteria apply to singleton nonanomalous fetuses.
US: United States; SMFM: Society for Maternal-Fetal Medicine; ACOG: American College of Obstetricians and Gynecologists; AIUM: American Institute of Ultrasound in Medicine; ISUOG: International Society of Obstetricians and Gynecologists; AC: abdominal circumference; EFW: estimated fetal weight; GA: gestational age; UA: umbilical artery; AEDF: absent end-diastolic flow (estimated by Doppler ultrasonography); PI: pulsatility index; CPR: cerebroplacental ratio.
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