## What does fetal biometry AC mean?

AC (abdominal circumference), the length going around your baby’s belly. FL (femur length), the length of a bone in your baby’s leg.

## What does fetal biometry AC mean?

AC (abdominal circumference), the length going around your baby’s belly. FL (femur length), the length of a bone in your baby’s leg.

## What does AC mean on ultrasound report?

Abdominal circumference (AC) is one of the basic biometric parameters used to assess fetal size. AC together with biparietal diameter, head circumference, and femur length are computed to produce an estimate of fetal weight.

What is the AC measurement on fetal ultrasound?

Fetal abdominal circumference (AC) is a measurement widely used in obstetric antenatal care. The AC measurement was described in 1975 and is taken at the level of the widest part of the fetal abdomen, across the liver. The transverse section includes the fetal stomach, spine and deep portion of the umbilical vein.

### What is normal AC at 32weeks?

Weeks BPD (mm) AC (mm)
31 78.4 270.2
31.5 79.6 275.1
32 80.7 280.0
32.5 81.9 284.8

### What is the normal AC at 36 weeks?

The equations at 36 weeks were: mean AC=53.090+1.081*GA and SD=1.253*(0.497+0.046*GA).

What is the normal AC at 20 week scan?

Calculating estimated fetal weight (EFW)

Gestational Age (Weeks) BPD Abdominal Circumference
18 weeks 42 129
19 weeks 46 141
20 weeks 49 152
21 weeks 52 164

#### What is normal AC at 20weeks?

Weeks BPD (mm) AC (mm)
19 43.0 136.9
19.5 44.7 143.0
20 46.4 149.1
20.5 48.1 155.1

#### What does a high AC mean in pregnancy?

Increasing fetal AC is associated with the later development of gestational diabetes (OR 2.343, p=0.0023) and polyhydramnios (OR 2.938, p=0.0003). Fetal AC does not predict lower Apgar score (OR 0.615, p=0.416), NICU admission (OR 0.824, p=0.167), or neonatal hypoglycemia (OR 1.047, p=0.852).

What is the normal AC at 21 weeks?

Weeks BPD (mm) AC (mm)
21 49.7 161.1
21.5 51.4 167.0
22 53.0 172.9
22.5 54.6 178.7

## What is normal AC at 36weeks?

Weeks BPD (mm) AC (mm)
36 88.8 317.3
36.5 89.7 321.7
37 90.5 326.1
37.5 91.3 330.4

## What does high AC mean on ultrasound?

Fetuses with larger abdominal circumferences on antenatal ultrasounds are more likely to be macrosomic with birth weight >4000 grams (OR 2.496, p < 0.0001). Increasing fetal AC is associated with the later development of gestational diabetes (OR 2.343, p=0.0023) and polyhydramnios (OR 2.938, p=0.0003).

How can you tell if its a boy or girl in ultrasound?

It is obtained by looking at a profile view of the fetus (known as the midline sagittal plane). There is a nub at the end of the spine, called the caudal notch. If it is pointing downward at a 10-degree angle, then the fetus is a girl.