During pregnancy, ultrasounds provide reassuring images and important health information at key moments. Understanding what weeks you get ultrasounds helps you prepare for each scan and know what to expect for you and your baby.
Your care team schedules ultrasounds based on health needs, pregnancy stage, and local guidelines. The following sections outline typical timing, purposes, and details for each common scan.
| Scan Type | Typical Weeks | Main Purpose | What to Expect |
|---|---|---|---|
| Early Dating Scan | 6–10 | Confirm due date and heartbeat | Transvaginal or abdominal, quick check of embryo |
| First Anatomy Scan | 11–14 | Screen for chromosomal conditions | Measure nuchal translucency, assess placenta |
| Anatomy Detail Scan | 18–22 | Detailed organ and growth check | Examine brain, heart, kidneys, limbs |
| Growth and Position Scan | 28–32 | Check growth, fluid, and baby position | Assess amniotic fluid and placental location |
| Late Term Scan | 36–40 | Confirm position and prepare for birth | Check baby’s size, cord flow, and delivery readiness |
Early Pregnancy Ultrasounds
In early weeks, ultrasounds focus on confirming the pregnancy and dating the due date. You may have a scan as early as 6 weeks if there is bleeding or uncertainty.
Between 6 and 10 weeks, a dating scan checks for a heartbeat and measures the embryo. This helps establish an accurate due date for the rest of your care.
First Trimester Screening Scan
Around 11 to 14 weeks, a first trimester anatomy scan evaluates early development and screening markers. This scan is often combined with blood tests for a more complete picture.
Key measurements include nuchal translucency, nasal bone, and hormone levels. The results, along with maternal age, help estimate risk for certain conditions.
Second Trimester Anatomy Scan
The detailed anatomy scan between 18 and 22 weeks is one of the most comprehensive checks during pregnancy. Providers examine the brain, spine, heart, stomach, kidneys, and limbs.
This scan also reviews the placenta, amniotic fluid levels, and confirms baby position when possible. Many parents learn the baby’s sex during this appointment if they wish.
Late Pregnancy Scans
Later in pregnancy, ultrasounds focus on growth, well-being, and preparation for delivery. Around 28 to 32 weeks, a growth scan checks that the baby is gaining weight appropriately.
At 36 to 40 weeks, a late term scan confirms the baby’s position, checks amniotic fluid, and assesses the placenta to guide birth planning. These scans help ensure the safest delivery possible.
Key Takeaways for Expecting Parents
- Know the typical scan windows: early dating, first trimester, anatomy, growth, and late term.
- Each scan has a specific purpose, from dating and screening to growth and position checks.
- Ask your provider about the recommended schedule based on your health and pregnancy details.
- Bring questions to each appointment so you understand what the images and measurements mean.
- Use scans as tools for informed decision making and shared planning with your care team.
FAQ
Reader questions
How many ultrasounds are typical during a normal pregnancy?
Most people have between 2 and 4 ultrasounds, though additional scans may occur if there are health concerns or complications.
Is it safe to have multiple ultrasounds in pregnancy?
Yes, diagnostic ultrasound is considered safe when performed by trained providers using standard guidelines.
Can ultrasound predict the exact delivery date?
Early ultrasounds improve due date accuracy, but they cannot guarantee the exact day labor will begin.
What happens if something looks unusual on an ultrasound?
You may be referred to a specialist for follow-up scans or further testing to gather more information.