29 weeks pregnant
Your baby is about 39 cm and 1.15 kg; the bones are getting stronger.
At week 29, your baby’s bones are getting stronger and they gain tens of grams a day. Movements are more noticeable and powerful.
This week’s ultrasound image
Expected ultrasound appearance and measurements at week 29 (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)
Length (head to heel)
38.8 cm
Head diameter
75 mm
Head circumference
273 mm
Femur length
56 mm
Estimated weight
1153 g
Heart rate
138 bpm
UA PI
0.98
How big is your baby this week?
About the size of a butternut squash
What can be seen on the ultrasound?
BPD is about 75 mm, HC about 273 mm, AC about 253 mm and FL about 56 mm. The estimated weight is around 1,150 grams.
Your baby’s development
Your baby is about the size of a butternut squash. They use a lot of calcium for their bones. The head is growing to make room for the developing brain.
Changes in your body
Shortness of breath, heartburn, swollen legs and varicose veins may increase.
Check-ups at this stage
- Routine check: blood pressure, weight, urine
- Growth scan if needed
- Monitoring your baby’s movements
Tips for this week
- Meet your daily calcium needs with dairy products or supplements recommended by your doctor
- Eat small, frequent meals
- Raising your head slightly while you sleep makes breathing easier
When should you see your doctor?
Contact your doctor if you have reduced baby movements, bleeding, leaking fluid, regular contractions, a severe headache or blurred vision.
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
Is shortness of breath normal in pregnancy?
Mild breathlessness is common because the growing womb pushes up on the diaphragm. Sudden, severe breathlessness, chest pain or palpitations need urgent assessment.
How much calcium do I need each day?
The recommended amount in pregnancy is usually around 1,000 mg a day. If you cannot get enough from your diet, your doctor may suggest a supplement.
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