You asked: What do the measurements on a baby scan mean?

What are the measurements on an ultrasound picture?

The most commonly used algorithms are; Biparietal Diameter (BPD), Head Circumference (HC), Abdominal Circumference (AC) and the Femur Length (FL). [4] (Figure 2) The combination of the measurements mentioned above will be used in a formula to calculate the baby’s weight and size.

What does the CM mean on an ultrasound picture?

Assessment of gestational age from gestational. sac diameter. Mean sac diameter (cm) Gestational age.

What are normal fetal measurements?

Calculating estimated fetal weight (EFW)

Gestational Age (Weeks) BPD Femur Length
18 weeks 42 27
19 weeks 46 30
20 weeks 49 33
21 weeks 52 36

How do you read fetal measurements?

CRL (crown-rump length), the length from the top of the head to your baby’s bottom, measurement taken in the first trimester. 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 are the signs of a big baby?

A larger than expected fundal height could be a sign of fetal macrosomia. Excessive amniotic fluid (polyhydramnios). Having too much amniotic fluid — the fluid that surrounds and protects a baby during pregnancy — might be a sign that your baby is larger than average.

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What are signs you’re having a boy?

It’s a boy if:

  • You didn’t experience morning sickness in early pregnancy.
  • Your baby’s heart rate is less than 140 beats per minute.
  • You are carrying the extra weight out front.
  • Your belly looks like a basketball.
  • Your areolas have darkened considerably.
  • You are carrying low.
  • You are craving salty or sour foods.

How do you read pregnancy ultrasound abbreviations?


  1. G = Gravida means # of Pregnancy.
  2. P = Parity means # of deliveries > 20 weeks , Ptpal (T=term,preterm,abortion, live child)
  3. Term = > 37 wks,2500 gms.
  4. Preterm = 20-37 wks,>500 gms
  5. Abortion =
  6. Post term = >42 weeks.
  7. Puerperium = birth -42 days postpartum.

How far along are you if the baby is 11 cm?

Fetal growth chart

Gestational age Length (US) Length (cm)
10 weeks 1.22 inch 3.1 cm
11 weeks 1.61 inch 4.1 cm
12 weeks 2.13 inches 5.4 cm
13 weeks 2.64 inches 6.7 cm

How much centimeters are there in an inch?

1 inch is equal to 2.54 cm, which is the conversion factor from inches to cm.

What is the normal size of gestational sac at 8 weeks?

1st Trimester Ultrasound Scanning

Gestational Age (Weeks) Sac Size (mm) CRL (mm)
7 27 8
8 29 15
9 33 21
10 31