Intrauterine growth restriction iugr

According to the American College of Obstetricians and Gynecologists (ACOG), which of the following is the best definition of intrauterine growth restriction (IUGR)?

1: An estimated fetal weight that is less than the 3rd percentile for the fetus's gestational age
2: A fetal ultrasound showing an abdominal circumference that is too small for the gestational age combined with a head circumference of appropriate size
3: An estimated fetal weight that is less than the 10th percentile for the fetus's gestational age
4: A fundal height measurement that is more than 3 cm smaller than the expected measurement for gestational age