10 weeks pregnant
The embryonic period ends; your baby is now called a fetus.
Week 10 marks the end of the embryonic period. Almost all the vital organs have formed; from now on, the focus is on growth and maturation.
This week’s ultrasound image
Expected ultrasound appearance and measurements at week 10 (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)
Gestational sac
41 mm
Crown–rump length
32 mm
Estimated weight
4 g
Heart rate
170 bpm
How big is your baby this week?
About the size of a strawberry
What can be seen on the ultrasound?
CRL is about 30–35 mm. The head becomes rounder, and the arms and legs move clearly. The heart rate is about 170 beats per minute.
Your baby’s development
Your baby is about the size of a strawberry. The bones begin to harden, and nail beds and tooth buds form. The kidneys start producing urine.
Changes in your body
Your womb is now about the size of an orange. For some people nausea starts to ease, though tiredness and breast tenderness may continue.
Check-ups at this stage
- NIPT (optional): screening for chromosomal conditions from the mother’s blood
- Booking your nuchal translucency (NT) scan and combined test for weeks 11–14
Tips for this week
- Plan a dental check-up; gums become more sensitive during pregnancy
- Pay attention to your sleep routine; short daytime naps are fine
- Protect yourself from the sun; skin is more prone to pigmentation during pregnancy
When should you see your doctor?
Contact your doctor if you have bleeding, one-sided or cramping pain, a fever or foul-smelling discharge.
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 NIPT?
NIPT is a screening test that analyses fragments of the baby’s DNA in the mother’s blood to assess the risk of common chromosomal conditions such as Down syndrome. It is not a diagnostic test; high-risk results are confirmed with further testing.
What is the difference between an embryo and a fetus?
The first 8 weeks after fertilisation (up to week 10 of pregnancy) are called the embryonic period; after that, it is the fetal period.
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