25 weeks pregnant
Your baby is about 32 cm and 660 grams; the hair and nostrils are developing.
At week 25, your baby is gaining weight quickly; the skin is turning pinker and becoming less wrinkled.
This week’s ultrasound image
Expected ultrasound appearance and measurements at week 25 (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)
31.9 cm
Head diameter
63 mm
Head circumference
232 mm
Femur length
46 mm
Estimated weight
660 g
Heart rate
141 bpm
How big is your baby this week?
About the size of a cauliflower
What can be seen on the ultrasound?
BPD is about 63 mm, HC about 232 mm, AC about 210 mm and FL about 46 mm. The amount of amniotic fluid is also assessed.
Your baby’s development
Your baby is about the size of a cauliflower. The nostrils open, and the colour and texture of the hair become more defined. The spine and joints are getting stronger.
Changes in your body
Piles (haemorrhoids), constipation and difficulty sleeping may begin. As your bump gets heavier, your balance changes.
Check-ups at this stage
- Glucose tolerance test (if not yet done)
- Routine check: blood pressure, weight, urine
- Iron treatment if needed
Tips for this week
- A high-fibre diet and plenty of water help prevent constipation and piles
- Sleep on your side with a pillow between your legs
- Bend your knees rather than bending over suddenly
When should you see your doctor?
Contact your doctor if you have bleeding, regular contractions, leaking fluid, 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
Why do piles happen in pregnancy?
Pressure from the growing womb on the blood vessels, along with constipation, can cause piles. A high-fibre diet, plenty of fluids and warm sitz baths help; check with your doctor before using any medication.
Why is amniotic fluid measured?
The amount of fluid gives information about your baby’s kidney function and how well the placenta is working. Too little or too much may need closer monitoring.
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