2nd Trimester

Week 17 of Pregnancy

Your baby is starting to store fat under the skin, and a white protective coating called vernix is forming. Growth is accelerating.

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Your Baby This Week

About the size of a avocado

Length: ~13cm

Quick Answer

At 17 weeks, your baby is about 13cm long — still avocado-sized but growing fast. A major shift is happening: fat is beginning to deposit under baby’s skin. This fat (called brown fat) will eventually help regulate body temperature after birth. A waxy white coating called vernix caseosa is also covering the skin, protecting it from the amniotic fluid. Aapka baby ab zyada “baby-like” dikhne laga hai.

Baby Development at Week 17

Your baby is putting on substance now — not just growing longer, but filling out:

  • Fat deposition begins — brown adipose tissue starts forming under the skin. Baby has been mostly skin and bone till now — that changes from here
  • Vernix caseosa appears — a white, waxy protective coating covers the skin. It prevents the skin from getting waterlogged in amniotic fluid and helps with delivery later
  • Cartilage hardening to bone — skeleton continues to ossify
  • Sweat glands developing — though they won’t be functional until after birth
  • Umbilical cord thickening — getting stronger to support increased blood flow
  • Reflexes sharpening — sucking, swallowing, and blinking reflexes are more defined
  • Brain growing rapidly — billions of neurons forming and connecting

The baby can now make more complex movements — stretching, yawning, even hiccupping, though you’re unlikely to feel the hiccups yet.

Your Body at Week 17

Your body is adjusting well to pregnancy by now. The bump is growing, and your centre of gravity continues to shift.

Common Symptoms

SymptomWhat’s HappeningWhat Helps
Growing bellyUterus is about 2 inches below the navel nowSupportive clothing. Side sleeping getting more comfortable with a pillow between knees
Increased vaginal dischargeLeucorrhea — normal thin white discharge increases throughout pregnancyCotton underwear. Panty liner if needed. No douching
Heartburn/acidityProgesterone relaxes the lower esophageal sphincterEat smaller meals. Don’t lie down for 2 hours after eating. Avoid deep fried food at night
Nasal congestionPregnancy rhinitis — stuffy nose without a coldSaline spray. Humidifier. Steam. Avoid antihistamines without doctor’s approval
DizzinessBlood pressure may drop as blood vessels dilateStand up slowly. Don’t skip meals. Stay hydrated
Stretch marksSkin stretching on belly, breasts, thighsMoisturise. Genetics play the biggest role — creams help with itching, not prevention

Your Mental Health Matters

Second trimester is often physically easier, but anxiety about the baby’s health, upcoming scans, and life changes is very real. Ye normal hai. Talk to your partner, a friend, or a counsellor. If anxiety is interfering with sleep or daily life, bring it up with your doctor.

Tests & Screenings Due

Quadruple Marker Reminder

The window is 15-20 weeks. If your doctor recommended it and you haven’t done it, get it scheduled. After 20 weeks, this test can’t be done.

Routine

  • Blood pressure and weight check
  • Urine protein and sugar
  • Fundal height measurement

Coming Up

  • Anomaly scan at 18-22 weeks — this is the most detailed ultrasound of the pregnancy

Nutrition This Week

What to Prioritize

  • Healthy fats — baby is depositing fat, and your body needs healthy fats for brain development. Ghee (1-2 tsp/day is fine), nuts, olive oil, avocado
  • Protein: 60-70g/day — growth is accelerating. Every meal needs protein
  • Iron: 60 mg/day — hemoglobin rechecks usually happen at 20 and 28 weeks
  • Vitamin D — many Indian women are deficient. 15-20 minutes of morning sun exposure. Your doctor may prescribe a supplement (typically 60,000 IU monthly, or weekly for a few weeks if levels are very low)
  • Fibre — constipation may worsen as the uterus grows. Whole grains, fruits, vegetables, isabgol

Indian Diet Tips for This Week

  • Dal-chawal with ghee — covers protein, carbs, and healthy fat
  • Ragi porridge with milk and jaggery — iron, calcium, and fibre
  • Handful of almonds and walnuts as a snack — magnesium, omega-3
  • Curd with every lunch — calcium + probiotics for gut health

When to Call Your Doctor

  • Any vaginal bleeding — always needs evaluation
  • Gush of fluid from vagina — call immediately
  • Severe headache with visual changes — flashing lights, blurred vision
  • Fever above 100.4°F (38°C)
  • Severe or persistent dizziness — could indicate anemia or blood pressure issues
  • Burning urination with fever — UTIs need treatment to prevent complications

What’s Coming Up

  • Week 18: Baby is covered in lanugo and developing a sleep-wake cycle. May respond to loud noises
  • Week 19: First kicks often felt! Unique fingerprints present
  • Week 20: Halfway point! Anomaly scan — the most important ultrasound of the pregnancy

Aapke Sawaal (Common Questions)

Vernix kya hota hai? Kya ye baby ke liye safe hai?

Vernix caseosa ek white, waxy layer hai jo baby ki skin ko amniotic fluid se protect karti hai. Ye bilkul natural hai — birth ke baad bhi baby pe hoti hai. Actually, ye baby ki skin ke liye bahut achhi hai — moisturiser jaisi kaam karti hai. Kuch hospitals ab delivery ke turant baad ise dhote nahi hain kyunki ye protective hai.

Mujhe bahut heartburn ho raha hai — kya koi safe medicine hai?

Pehle lifestyle changes try karein: chhote meals khayein, khana khane ke baad 2 ghante lie mat padein, aur raat ko fried/spicy food avoid karein. Agar phir bhi relief na mile, toh doctor se poochein — antacids jaise Gelusil ya Eno safe mane jaate hain pregnancy mein. Agar bahut zyada ho, toh doctor famotidine ya omeprazole likh sakte hain.

Stretch marks se kaise bachein?

Honestly, stretch marks mostly genetics pe depend karti hain. Koi cream ya oil guaranteed prevention nahi hai. Lekin moisturising se itching kam hoti hai aur skin comfortable rehti hai. Coconut oil, cocoa butter, ya vitamin E cream use kar sakte hain. Jo bhi ho — ye pregnancy ke marks hain, time ke saath fade ho jaate hain.

Week 17 Checklist

  • Continue iron 60 mg/day and calcium supplements
  • Eat healthy fats — ghee, nuts, avocado — baby is depositing fat now
  • Keep up with daily walks and pelvic floor exercises
  • If you haven't done quadruple marker yet, the window is 15-20 weeks
  • Start thinking about baby names — a fun distraction
  • Moisturise belly, breasts, and thighs to manage stretch marks
  • Plan your anomaly scan appointment (18-22 weeks)

Have Questions About Week 17?

Chat with our pediatricians for expert guidance throughout your pregnancy.

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Medically Reviewed

by Babynama Pediatricians · Updated 2026-03-12