11 weeks pregnant
First-trimester screening begins; CRL is about 4.3 cm.
Week 11 marks the start of the window for first-trimester screening, with the nuchal translucency (NT) measurement and the combined test.
This week’s ultrasound image
Expected ultrasound appearance and measurements at week 11 (illustrative, to-scale drawing).
Abbreviations on the screen
- GS
- Gestational sac diameter
- YS
- Yolk sac
- CRL
- Crown–rump length
- NT
- Nuchal translucency
- BPD
- Biparietal diameter (head width)
- HC
- Head circumference
- AC
- Abdominal circumference
- FL
- Femur (thigh bone) length
- EFW
- Estimated fetal weight
- FHR
- Fetal heart rate (beats per minute)
- GA
- Gestational age (weeks + days)
- UA PI
- Umbilical artery Doppler resistance (PI)
Crown–rump length
43 mm
Nuchal translucency
1.1 mm
Estimated weight
8 g
Heart rate
165 bpm
How big is your baby this week?
About the size of a fig
What can be seen on the ultrasound?
The scan is now mostly done through the abdomen. CRL is about 40–45 mm. Your baby’s profile, skull, spine, arms and legs can be seen. The thin layer of fluid at the back of the neck (NT) is measured.
Your baby’s development
Your baby is about the size of a fig and weighs around 8 grams. The bones are hardening, nails are forming and the fingers are fully separated. Your baby can yawn and swallow.
Changes in your body
Your energy may slowly start to return. A blocked nose and bleeding gums can occur due to pregnancy hormones.
Check-ups at this stage
- Nuchal translucency (NT) scan (11 weeks to 13 weeks + 6 days)
- Combined test blood sample (PAPP-A and free beta-hCG)
- Nasal bone and early anatomy assessment
Tips for this week
- Ask your clinic whether you need a full bladder for the NT scan
- Saline nasal rinses can help with a blocked nose
- Use a soft toothbrush
When should you see your doctor?
Contact your doctor if you have bleeding, severe abdominal pain or leaking fluid.
Growth by week
Values are averages; differences of a few days or a few millimetres between babies are normal.
| Pregnancy weeks | Crown–rump length (cm) | Weight (g) |
|---|---|---|
| Week 4 | — | — |
| Week 5 | — | — |
| Week 6 | 4 mm | — |
| Week 7 | 10 mm | — |
| Week 8 | 16 mm | 1 g |
| Week 9 | 23 mm | 2 g |
| Week 10 | 32 mm | 4 g |
| Week 11 | 43 mm | 8 g |
| Week 12 | 55 mm | 14 g |
| Week 13 | 68 mm | 23 g |
| Week 14 | 85 mm | 43 g |
| Week 15 | 100 mm | 70 g |
| Week 16 | 115 mm | 100 g |
| Week 17 | 128 mm | 140 g |
| Week 18 | 140 mm | 190 g |
| Week 19 | 152 mm | 240 g |
| Week 20 | 25.6 cm | 300 g |
| Week 21 | 26.7 cm | 360 g |
| Week 22 | 27.8 cm | 430 g |
| Week 23 | 28.9 cm | 501 g |
| Week 24 | 30 cm | 600 g |
| Week 25 | 31.9 cm | 660 g |
| Week 26 | 33.8 cm | 760 g |
| Week 27 | 35.6 cm | 875 g |
| Week 28 | 37.5 cm | 1005 g |
| Week 29 | 38.8 cm | 1153 g |
| Week 30 | 40 cm | 1319 g |
| Week 31 | 41.3 cm | 1502 g |
| Week 32 | 42.5 cm | 1702 g |
| Week 33 | 43.6 cm | 1918 g |
| Week 34 | 44.8 cm | 2146 g |
| Week 35 | 45.9 cm | 2383 g |
| Week 36 | 47 cm | 2622 g |
| Week 37 | 48 cm | 2859 g |
| Week 38 | 49 cm | 3083 g |
| Week 39 | 50 cm | 3288 g |
| Week 40 | 51 cm | 3462 g |
Frequently asked questions
What is nuchal translucency (NT)?
It is an ultrasound measurement of the thin layer of fluid at the back of the baby’s neck. Together with the mother’s age and blood test results, it is used to calculate the risk of chromosomal conditions.
What should the NT measurement be?
At this stage it is usually below 3 mm and rises slightly as CRL increases. What the result means is assessed together with the combined test and the mother’s age.
Your pregnancy care at SoftCare Clinic
Book an appointment with our specialist doctors for your ultrasound check-up and any questions you may have.
The information on this page is for general guidance only and does not replace a medical examination. Measurements are average values; please discuss your own results with your doctor.
Medical content editor: Op. Dr. Şükrü Sanus