A week by week pregnancy chart is your definitive roadmap through the 280 days of gestation. In India, we don't just count days; we count milestones like the first Godh Bharai or the shift from eating amla to craving imli. This guide tracks your baby’s growth from a tiny rai ka dana (mustard seed) to a full-sized nariyal (coconut), while helping you manage Indian dietary norms and medical protocols like the NT scan and the glucose challenge test.

Tracking your progress using a pregnancy week by week guide helps you stay ahead of the curve, ensuring you never miss a folic acid dose or a FOGSI-recommended screening.

The First Trimester: Weeks 1 to 13 (The Foundation)

The first trimester is the most critical phase for organogenesis. While your bump isn't visible, your body is working overtime to build the placenta. During these weeks, your primary focus is on preventing neural tube defects by taking 400mcg of folic acid daily, as per ICMR guidelines.

Month 1 (Weeks 1-4)

Baby’s Size: A tiny poppy seed (khus khus*).

* What’s Happening: The blastocyst implants into the uterine lining. You might experience "spotting," which many Indian moms mistake for a light period.

Indian Context: Start your prenatal vitamins. Avoid high-mercury fish and unpasteurized paneer*. If you are planning, use a pregnancy week by week pregnancy calculator to estimate your due date based on your Last Menstrual Period (LMP).

Month 2 (Weeks 5-8)

Baby’s Size: A peppercorn (kali mirch) to a kidney bean (rajma*).

* What’s Happening: The heart begins to beat. Morning sickness (which is actually all-day sickness for many) kicks in.

Pro-Tip: Keep a piece of adrak (ginger) or a small jar of amla murabba* nearby to combat nausea.

Month 3 (Weeks 9-13)

Baby’s Size: A green grape (angoor) to a medium lemon (nimbu*).

* Medical Milestone: The NT Scan (Nuchal Translucency) usually happens between weeks 11 and 13. This is also when many families choose to share the news after the first trimester risk drops.

The Second Trimester: Weeks 14 to 27 (The Golden Period)

Often called the "honeymoon phase," your energy returns, and the garbh starts to show. This is the time to focus on a protein-rich pregnancy nutrition guide to support the baby's rapid muscle growth.

Month 4 (Weeks 14-17)

Baby’s Size: A large lemon to a mosambi* (sweet lime).

* What’s Happening: Baby can now make faces and might even start sucking their thumb.

Mom’s Body: You might notice a dark line appearing on your belly (linea nigra*). Don't worry, it's just hormones!

Month 5 (Weeks 18-22)

Baby’s Size: A sweet potato (shakarkandi*) to a banana.

* The Big Scan: The Anomaly Scan (Level II Ultrasound) is performed around week 20 to check the baby’s physical development and heart chambers.

Quick Tip: Start sleeping on your side. Use a pregnancy pillow or a long takiya* between your knees for support.

Month 6 (Weeks 23-27)

Baby’s Size: An eggplant (baingan) to a head of cauliflower (phool gobhi*).

* What’s Happening: "Quickening" or baby kicks become frequent.

Indian Rituals: Many communities celebrate the Pumsavana or Seemantham* during this window. Ensure you aren't standing for too long during these ceremonies.

The Third Trimester: Weeks 28 to 40+ (The Final Stretch)

You are now in the home stretch. Your week by week pregnancy chart now focuses on lung maturity and positioning for birth.

Month 7 (Weeks 28-31)

Baby’s Size: A large cabbage (patta gobhi*).

* Preparation: Register for the PMMVY (Pradhan Mantri Matru Vandana Yojana) if you are eligible, to receive the ₹5,000 incentive for institutional health seeking.

Health: Watch out for swelling in your feet (edema). Reduce excess salt in your dal and sabzi*.

Month 8 (Weeks 32-35)

Baby’s Size: A pineapple to a papaya*.

* What’s Happening: The baby is likely turning head-down (cephalic position).

* Mom’s Body: You might feel Braxton Hicks contractions. Use our due date calculator to double-check your expected arrival window.

Month 9 (Weeks 36-40+)

Baby’s Size: A small watermelon or a large nariyal*.

Final Steps: Pack your hospital bag. Include soft cotton front-open gowns for breastfeeding and a shawl* for the baby.

Postnatal Planning: Start looking into postnatal recovery options, including hiring a Japa maid or setting up a support system for the first 40 days (Sawa Mahina*).

How to use a pregnancy calculator week by week?

Using a pregnancy calculator week by week is simple but requires your LMP (Last Menstrual Period) date. In India, most OB-GYNs follow the Naegele’s Rule: Add 7 days to the first day of your LMP and then add 9 months.

However, if you have an irregular cycle, the dating scan (first ultrasound) is the gold standard. Knowing your exact week helps you track whether you are week by week pregnant in a way that aligns with your specific trimester needs, such as increasing iron intake in the third trimester to prevent gestational anemia, which affects over 50% of pregnant women in India according to the NFHS.

Essential Indian Pregnancy Diet Chart

A standard Indian diet needs specific tweaks during these 40 weeks:

First Trimester: Focus on folate. Eat palak, methi*, and citrus fruits.

Second Trimester: Increase Calcium and Iron. Drink two glasses of milk (or ragi malt) and eat iron-rich poha or jaggery*.

Third Trimester: Focus on healthy fats and fiber to avoid constipation. Add a teaspoon of Ghee to your khichdi and eat plenty of fiber-rich guavas*.

Real Talk from Indian Moms

"I used to track my baby's size every Sunday. When the chart said 'Papaya size,' my mother-in-law panicked because she thought I was eating papaya! I had to explain it was just a comparison."

— Megha S., Bengaluru, Mom to 4-month-old

"During my seventh month, the heat in Chennai was unbearable. My week by week pregnancy chart reminded me to stay hydrated, so I lived on elaneer (coconut water) and buttermilk."

— Lakshmi R., Chennai, Mom to 1-year-old

When to call your Gynaecologist/Paediatrician

While pregnancy brings many new sensations, certain signs require immediate medical attention:

* Vaginal Bleeding: Any amount of bright red blood.

* Reduced Fetal Movement: If you don't feel at least 10 kicks in 2 hours during the third trimester.

* Severe Swelling: Sudden puffiness in the face and hands (could indicate preeclampsia).

* High Fever: Anything over 100.4°F (38°C).

* Gush of Fluid: This could mean your "water broke" early.

Frequently Asked Questions

What is the most accurate week by week pregnancy chart?

The most accurate chart is one that combines your LMP date with your first-trimester dating ultrasound. Since every baby grows at a slightly different rate, these charts provide a mean average. Always trust your doctor’s measurements over a generic app.

How do I use a pregnancy calculator week by week?

You enter the date of your last period and your average cycle length. The calculator then tells you exactly how many weeks and days you are, as well as your estimated due date (EDD). You can find a reliable pregnancy week by week pregnancy calculator to start your journey.

Why does my pregnancy month week by week not align perfectly?

Pregnancy is technically 40 weeks, which is 10 lunar months, not 9 calendar months. This is why a pregnancy month week by week breakdown can be confusing. For example, being 20 weeks pregnant means you are at the end of your 5th month.

Can I travel during the second trimester?

Generally, yes, between weeks 14 and 28. This is the safest time to travel. However, always consult your doctor, especially if you have a low-lying placenta or history of preterm labor. Carry your latest scan reports and a "fit to fly" certificate if traveling by air.

Is it normal to have back pain in the third trimester?

Yes, as your center of gravity shifts and the hormone relaxin loosens your joints. Gentle pregnancy yoga and wearing supportive footwear can help. If the pain is sharp or rhythmic, contact your doctor as it could be early labor.

Whether you are in your first week or your thirty-ninth, remember that your body is performing a miracle. Stay hydrated, eat your ghar ka khana, and take it one day at a time.

You are doing a great job, and you are exactly where you need to be.

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Sources & further reading

• ICMR Dietary Guidelines for Indians
• FOGSI - Perinatal Health Recommendations
• NHP India - Pregnancy Care
• PMMVY Scheme Details

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Written by Dr. Ritu Sharma, MD (Obstetrics & Gynaecology)

Reviewed by TheMamaCircle Editorial Team

Last updated: 12 August 2026

This article is for general information only and is not a substitute for personalised medical advice. Always consult your paediatrician or obstetrician for your specific situation.