17 Weeks Pregnant
You’re 17 weeks pregnant — in the second trimester, and 23 weeks to go until your due date. Your baby is about the size of a pomegranate this week.
How big is your baby at 17 weeks?
Size of a
pomegranate
Length
~13 cm
Weight
~140 g
Last week your baby was about the size of a avocado; this week it's grown to roughly a pomegranate.
Sizes are averages from standard fetal-growth references. Every baby grows at its own pace — your provider tracks yours at scans.
Baby development at week 17
Body fat begins to form, which will help regulate temperature after birth. The skeleton is shifting from soft cartilage to harder bone, and the umbilical cord is growing thicker and stronger. Sweat glands are developing, and the fetus is practising sucking and swallowing. About the size of a pomegranate.
Your body at 17 weeks
Common symptoms many people notice around week 17 include:
- Stronger appetite
- Possible dizziness from blood-pressure changes
- Increased vaginal discharge
- Vivid dreams
Symptoms vary enormously from person to person and pregnancy to pregnancy. Not having a symptom on this list is just as normal as having it.
Tips for week 17
- Move slowly when standing to avoid dizziness
- Stay hydrated and eat regularly to keep blood sugar steady
- Side-sleeping (preferably left) improves circulation to the baby
What trimester is 17 weeks?
Week 17 falls in the second trimester. As a quick map: the first trimester runs weeks 1–13, the second covers weeks 14–27, and the third is week 28 through birth (a due date is set at 40 weeks). Want your own dates? Our Pregnancy Due Date Calculator shows your due date and exactly how far along you are today.
The second trimester (weeks 14–27) is the stretch many people find most comfortable: early nausea usually fades, energy returns, and the bump becomes visible. The big checkpoint is the mid-pregnancy anatomy scan around week 20, and you'll likely feel the first movements during these weeks.
Frequently asked questions
- How many months is 17 weeks pregnant?
- 17 weeks pregnant is about 4 months. Pregnancy months don't divide evenly into 4-week blocks, so week-to-month conversions are approximate — most providers track pregnancy by week, not month.
- How big is the baby at 17 weeks?
- At 17 weeks, the baby is about the size of a pomegranate, roughly 13 cm and around 140 g. These are averages — healthy babies vary, and your provider tracks your baby's own growth curve at scans.
- What trimester is 17 weeks?
- Week 17 is in the second trimester. The first trimester is weeks 1–13, the second is weeks 14–27, and the third is weeks 28 to birth (around week 40).