Week 18: Anatomy Scan Prep
The big ultrasound is this week or next — here's what to know
The anatomy scan is the most comprehensive ultrasound of the pregnancy. It checks every major organ system, measures growth, evaluates the placenta, and (if you want) reveals the sex. Go in prepared — this appointment takes 30–60 minutes and covers a lot of ground.
What's happening this week
The baby's ears are in their final position, and hearing is developing. The baby can now hear your voice and her heartbeat. Myelin (nerve insulation) is forming around the spinal cord and brain. The baby is actively moving, kicking, and somersaulting.
Your checklist
0 of 4 completeThe scan typically lasts 30–60 minutes. The sonographer will measure the head, abdomen, and femur; check the brain, heart, kidneys, spine, and other organs; evaluate the placenta and amniotic fluid; and determine sex if requested. She may need a full bladder for part of the scan.
Is everything measuring on track? Any concerns with the placenta position? Are there any soft markers? Is the amniotic fluid level normal? Is the cervical length adequate?
If you're finding out the sex at this scan and planning a reveal party, ask the sonographer to write it in a sealed envelope. If you just want to know in the room, say so upfront.
Around weeks 18–22, kicks become strong enough for dads to feel from the outside. Place your hand on her belly when she feels movement. It might take a few tries, but it's worth the patience.
Recommended products
Sonogram Photo Frame — Pearhead
A keepsake frame designed specifically for ultrasound photos. Perfect for displaying the anatomy scan image at home or gifting to grandparents. Simple, tasteful design that works in the nursery or on a shelf.
The anatomy scan, also called the mid-pregnancy ultrasound or level 2 ultrasound, is typically performed between weeks 18 and 22. It's the most detailed imaging of the entire pregnancy, examining the baby's brain, heart, kidneys, bladder, stomach, spine, limbs, and facial structures. The sonographer will also evaluate the placenta position, amniotic fluid levels, and umbilical cord.
For dads, this is one of the most memorable appointments. You'll see the baby in remarkable detail — fingers, toes, profile, and (if you choose) sex. The scan can also identify potential concerns like placenta previa, short cervix, or structural anomalies. Most scans come back completely normal. If something is flagged, your OB will explain what it means and whether additional monitoring or testing is needed.
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