Chapter 19

Ten Key Things You Can See on Ultrasound

In This Chapter

arrow Seeing what the sonographer sees

arrow Checking your baby’s health from ultrasound

arrow Determining whether you’re having a girl or a boy

If you’ve ever had a parent-to-be show you an ultrasound picture of the baby, you know determining what you’re looking at, let alone detecting a family resemblance, isn’t always easy! But ultrasound pictures can be amazingly clear and useful — if you know what you’re looking for. In this chapter, we show you what doctors and sonographers try to pick out on ultrasound to find out whether the baby is growing and developing well.

Measurement of Crown-Rump Length

The crown-rump length (CRL) is the distance from the top of the fetus’s head (crown) to the buttocks (rump) during the first trimester (see Figure 19-1). It’s the most precise sonographic measurement your practitioner can use to estimate gestational age. The other things that you can see in this image are a measurement of the nuchal translucency (NT) and the nasal bone (NB). (See Chapter 5.)

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Image captured by Allison Borges, RDMS, and ...

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