Third-Trimester Prenatal Checkups: Timeline & Complete Guide

Updated: 2025-09-06 · Reading time: ~6 mins · Prenatal care guide

The third trimester (28 weeks onward) is a crucial stage when the baby grows rapidly and prenatal visits become more frequent. Regular checkups help monitor fetal development and detect maternal risks early. Here’s a breakdown of the prenatal checkup timeline and common tests in late pregnancy—a must-know for new parents.

Third-trimester checkup timeline

• 28–36 weeks: Every 2 weeks.
• After 36 weeks: Weekly visits until delivery.

Common third-trimester checkup items

1. Routine physical checks

• Weight, blood pressure, fundal height, and abdominal circumference
• Evaluation of fetal position and amniotic fluid levels

2. Laboratory tests

• Complete blood count: Screens for anemia.
• Urine test: Monitors protein levels to detect preeclampsia risk.
• Blood sugar test: Prevents or tracks gestational diabetes.

3. Fetal monitoring

• Non-stress test (NST): Checks for fetal oxygen levels and well-being.
• Ultrasound scan: Monitors growth, position, amniotic fluid volume, and placenta health.

4. Additional tests (as needed)

• Electrocardiogram (to evaluate maternal heart function).
• Liver and kidney function tests (if complications are suspected).
• Repeat screenings for hepatitis B, syphilis, and HIV.

 When to seek medical attention

If you notice abnormal fetal movement, bleeding, abdominal pain, or severe swelling, seek medical care immediately—even if it’s not your scheduled checkup time.

‍ Doctor’s advice

Prenatal checkups in the third trimester are essential for maternal and fetal safety. Follow your doctor’s schedule closely and don’t skip visits, even if you feel well.

Extended Reading

• 7 Early Signs of Pregnancy Every New Mom Should Know
• Safe Exercises for the Second Trimester: Boost Strength & Support Natural Birth
• How to Ease First-Trimester Anxiety? Psychologist-Recommended Methods
• Early Pregnancy Discomforts & Relief Tips

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This article is for general educational purposes only and does not replace medical advice. Prenatal schedules should always follow your doctor’s personalized recommendations.

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