17 Weeks Pregnant
At 17 weeks pregnant, your baby is about the size of a pear.
- Length
- 13 cm (5.1 in)
- Weight
- 140 g (5 oz)
- Trimester
- Second
- Month
- Month 4
- Weeks to go
- 23
Size of a pear
Your baby at 17 weeks
Your baby is about the size of a pear. Their skeleton is hardening from rubbery cartilage to bone, and fat is starting to build up under the skin. The umbilical cord is getting thicker and stronger.
Your body at 17 weeks
Your center of gravity is shifting as your bump grows. Itchy skin over your belly and breasts is common as they stretch.
Common symptoms at 17 weeks pregnant
- Itchy, stretching skin
- Increased appetite
- Back pain
- Vivid dreams
Every pregnancy is different. Having none of these symptoms is normal too.
Tips for week 17
- Wear flat, supportive shoes.
- Tell your provider about intense itching, especially on the palms and soles; it can be a sign of a liver condition called cholestasis.
- Start a pregnancy journal to remember these weeks.
Your week 17 checklist
- Wear flat, supportive shoes
- Report intense itching to your provider
- Start a pregnancy journal
Helpful at 17 weeks
17 Weeks Pregnant: your questions answered
How big is a baby at 17 weeks pregnant?
At 17 weeks your baby is about the size of a pear: around 13 cm (5.1 in) long and weighing about 140 g (5 oz). Every baby grows at their own pace.
How many months is 17 weeks pregnant?
17 weeks pregnant is month 4 of your pregnancy, in the second trimester. Your due date is 23 weeks away.
Is back pain normal at 17 weeks?
Yes, it is common as your center of gravity shifts and pregnancy hormones loosen your joints. Good posture, supportive shoes and gentle exercise help. Severe or rhythmic back pain should be checked.
Sources
This guide is written from public guidance by the American College of Obstetricians and Gynecologists (ACOG), the NHS, the CDC and the World Health Organization. Baby sizes are averages; your baby may be bigger or smaller and still perfectly healthy.
General information only, not medical advice.
History of updates
- : Added a weekly checklist and common questions.
- : Matched fruit, length and weight to the Prego app.
- : Published.