Welcome to week 17 of pregnancy – you’re now well into your second trimester, and big changes are happening for both you and your baby.
From noticeable belly growth to more defined baby movements, this is an exciting and important stage in your pregnancy journey.
In this complete guide, we’ll cover everything from your baby’s rapid development to how your body is changing, common symptoms, expert tips, and what you should prepare for next.
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How Big Is Your Baby at 17 Weeks Pregnant?
At 17 weeks pregnant, your baby is about the size of a melon or a pomegranate – roughly 5 inches long (12–13 cm) and weighing around 5 ounces (140 grams).
That’s almost double the weight from just two weeks ago!
Your little one is growing fast, and with that growth comes some amazing developmental milestones.
Baby Development at 17 Weeks
Your baby is not just growing in size but also rapidly maturing in structure and function.
1. Skeleton Hardening
The soft cartilage is now turning into bone, especially in the legs, arms, and spine. The development of bone is crucial at this stage, supported by nutrients like calcium, magnesium, and vitamin D.
2. Brown Fat Formation
Your baby is starting to develop brown fat – a special type of fat that helps generate heat and regulate body temperature after birth.
3. Movable Joints
The joints are now fully formed and mobile. Your baby can bend their elbows, knees, wrists, and more, practicing movements and even doing little stretches and flips in the womb.
4. Strengthening Umbilical Cord
The umbilical cord, which delivers oxygen and nutrients from you to your baby, is becoming thicker and stronger to support the growing fetus.
5. Eye & Skin Development
- Sweat glands begin forming
- The skin is still thin and translucent
- Behind still-fused eyelids, your baby’s eyes are beginning to move slowly from side to side
How Your Body Is Changing at 17 Weeks
You’re likely starting to feel more pregnant, and maybe even getting comments about your growing bump! Here’s what else is happening with your body.
1. Weight Gain and Belly Growth
Most women gain about 1–2 pounds per week during the second trimester. Your belly is becoming more pronounced as the uterus expands.
2. Shift in Center of Gravity
As your bump grows, your center of gravity shifts. You might start to feel a little off-balance – making it important to avoid risky activities, wear flat shoes, and move with care.
3. Dry Eyes and Blurry Vision
Hormonal changes can cause dry eyes or make wearing contact lenses uncomfortable. It’s safe to switch to glasses or use lubricating eye drops (with doctor approval).
4. Leg Cramps and Back Pain
As your uterus grows, it can press on nerves and blood vessels, leading to cramps or backaches. Gentle stretching, warm baths, or prenatal yoga may help.
Nutrition Tips for Week 17
- Calcium & Vitamin D: Help build your baby’s bones (found in dairy, leafy greens, and fortified foods)
- Iron-rich foods: Prevent anemia and support increased blood volume
- Omega-3s: Support brain development (found in fatty fish, walnuts, flaxseeds)
- Hydration: Aim for at least 8–10 glasses of water daily
Also, continue taking your prenatal vitamins as prescribed.
Safe Exercises for 17 Weeks Pregnant
Exercise during the second trimester can boost your mood, reduce back pain, and help with sleep. Great choices include:
- Prenatal yoga
- Swimming
- Walking
- Pelvic floor (Kegel) exercises
Avoid: Contact sports, heavy lifting, and exercises that require lying flat on your back for long periods.
Travel and Safety Tips
- Always wear a seatbelt correctly – lap belt below your belly, shoulder belt across your chest
- Take frequent breaks during long drives to stretch and move
- Avoid high-risk travel zones or long-haul trips without doctor clearance
Common Symptoms at 17 Weeks Pregnant
You may experience:
- Mild abdominal aches or stretching (round ligament pain)
- Increased appetite
- Vivid dreams
- Nasal congestion
- Mild swelling in hands or feet
These are usually normal. However, if you experience severe pain, bleeding, dizziness, or blurred vision, call your healthcare provider immediately.
When Will You Feel Baby Kicks?
You may begin to feel quickening (baby movements) anytime between 16–20 weeks. It often feels like gentle flutters or bubbles, especially noticeable when you’re resting or lying down.
First-time moms may feel it a bit later than those who’ve been pregnant before.
To-Do List This Week
- Schedule your mid-pregnancy ultrasound (around 18–20 weeks)
- Buy comfortable maternity wear if you haven’t already
- Start a baby name list
- Begin looking into prenatal classes or childbirth education
- Track your symptoms and baby bump with a pregnancy journal or app
At 17 weeks pregnant, your baby is growing rapidly, your body is adapting beautifully, and your pregnancy is in full swing.
This is a time to stay active, eat well, and cherish the little milestones – from watching your belly grow to imagining those first tiny kicks.
You’re nearly halfway there, mama. Keep taking care of yourself and trust your body – you’re doing great!
