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4 Months Pregnant

Weeks 14–17 · Second trimester. What’s happening with your baby and your body in the fourth month of pregnancy, plus tests, food and tips.

Reviewed against ACOG & WHO guidance Updated 25 September 2026

Overview

Month 4 opens the second trimester, often the most comfortable stretch of pregnancy. Appetite improves, energy returns and your bump becomes noticeable.

Your baby this month

Your baby grows from about 9 cm to 13 cm and around 140 g. Fine lanugo hair covers the skin, the skeleton starts to harden, the eyes move, and the baby can make facial expressions.

Your body this month

Nausea usually fades. You may notice a stuffy nose, nosebleeds, bleeding gums and round ligament pain. Some women, particularly in a second pregnancy, feel the first flutters late this month.

Check-ups & tests

  • Start iron-folic acid and calcium tablets as prescribed
  • Deworming with albendazole after the first trimester (national guideline)
  • Quadruple marker test at 15–20 weeks if first-trimester screening was not done

Nutrition this month

  • About 350 extra kcal a day from the second trimester – e.g. a bowl of dal with a roti
  • Iron-rich foods: green leafy vegetables, jaggery, dates, meat
  • Calcium: milk, curd, ragi, sesame

Tips for month 4

  • Take calcium and iron at different times of day
  • Wear comfortable, loose clothing
  • Protect skin from strong sun to limit pigmentation

Weeks in month 4

Week14Week15Week16Week17

FAQs

How many weeks is 4 months pregnant?

Month 4 of pregnancy covers roughly weeks 14 to 17. Because calendar months are longer than four weeks, different charts place the boundaries slightly differently.

Which trimester is month 4?

Month 4 is in the second trimester.

What should I avoid in month 4 of pregnancy?

Avoid alcohol, smoking, tobacco, unprescribed medicines, raw or undercooked meat and eggs, unpasteurised milk products and excessive caffeine throughout pregnancy. Ask your doctor about any specific restrictions for you.

Medical disclaimer: The results and information on this page are estimates for general education only. They are not a diagnosis and do not replace advice from your gynaecologist, obstetrician or midwife. If you have pain, bleeding, reduced baby movements or feel unwell, contact your doctor or call 108 immediately. Read the full disclaimer.

Written by the Pregnancy Calculator editorial team. Based on published obstetric guidance (ACOG, WHO, MoHFW India, FOGSI). Last updated . How we create content.