14 weeks pregnant
The second trimester begins; your baby’s crown–rump length is about 8.5 cm.
Week 14 marks the start of the second trimester. For many mums-to-be, this is the most comfortable part of pregnancy: nausea eases and energy returns.
This week’s ultrasound image
Expected ultrasound appearance and measurements at week 14 (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
85 mm
Head diameter
27 mm
Head circumference
100 mm
Femur length
14 mm
Estimated weight
43 g
Heart rate
156 bpm
How big is your baby this week?
About the size of a peach
What can be seen on the ultrasound?
Head diameter (BPD), head circumference (HC), abdominal circumference (AC) and femur length (FL) are now measured. BPD is about 27 mm and FL about 14 mm. The heart rate is about 155 beats per minute.
Your baby’s development
Your baby is about the size of a peach and weighs around 43 grams. Facial expressions are developing: your baby can frown and suck their thumb. The body begins to be covered in fine hair (lanugo).
Changes in your body
For most people nausea passes and appetite increases. Your womb rises into the abdomen and your bump becomes more noticeable.
Check-ups at this stage
- Routine check: blood pressure, weight, urine
- Planning the quadruple test for weeks 15–20 (if needed)
- Dental check-up
Tips for this week
- Meet your increased appetite with balanced meals
- Get used to sleeping on your side; a pillow between your knees can help
- Use a moisturiser on stretching skin
When should you see your doctor?
Contact your doctor if you have bleeding, regular contractions, fluid leaking from the vagina or a severe headache.
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
When does the second trimester begin?
The second trimester begins at week 14 and lasts until the end of week 27.
Which measurements are taken from now on?
Instead of CRL, head diameter (BPD), head circumference (HC), abdominal circumference (AC) and femur length (FL) are measured; the estimated weight is calculated from these.
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