Third Trimester Pregnancy Checkups: What to Expect Each Visit

Quick take: Third‑trimester prenatal visits become more frequent—usually every two weeks until 36 weeks, then weekly—so your provider can monitor blood pressure, fetal growth, and any emerging concerns. Expect routine checks (weight, fundal height, heartbeat) plus targeted labs and ultrasounds; high‑risk pregnancies may need extra testing. If you notice sudden swelling, severe pain, bleeding, or a drop in baby movements, call your doctor right away.

It’s 10 p.m., you’re curled up on the couch, and a gentle kick in your belly makes you wonder, “Is this normal? Do I need to do something different now that I’m in my third trimester?” You’re not alone. The third trimester can feel like a marathon of appointments, tests, and new sensations, and it’s natural to crave clear, reassuring answers.

In this guide we’ll walk you through everything you need to know about third‑trimester pregnancy checkups—from how often you’ll see your provider, to the specific measurements and labs taken, to what red‑flag symptoms mean you should call right away. We’ll also cover how high‑risk care differs, what to bring to each visit, and how insurance typically handles these appointments.

By the end of this article you’ll have a solid roadmap for the weeks ahead, a list of questions to ask your provider, and confidence that you’re doing everything you can to stay healthy and prepare for labor.

What tests are done during third trimester pregnancy checkups?

During the final three months of pregnancy, providers focus on two main goals: confirming that the baby is growing well and spotting any maternal complications early. The core set of tests includes:

• Blood pressure measurement – high blood pressure can signal pre‑eclampsia.
• Fundal height – the distance from the pubic bone to the top of the uterus, measured with a tape measure.
• Fetal heart rate – captured with a Doppler device; normal range is 110–160 bpm.
• Weight check – tracks weight gain; typical third‑trimester gain is 0.5–1 lb (0.2–0.45 kg) per week.
• Urine dipstick – screens for protein, glucose, and signs of infection.
• Blood work – includes hemoglobin/hematocrit, blood type, Rh factor, and sometimes a glucose tolerance retest if indicated.
• Ultrasound – a growth scan (often at 28–32 weeks) and a late‑term anatomy scan if needed.
• Group B Streptococcus (GBS) culture – usually performed at 35–37 weeks to guide intrapartum antibiotics.

These examinations are guided by recommendations from the American College of Obstetricians and Gynecologists (ACOG) and the UK’s National Institute for Health and Care Excellence (NICE). They are designed to catch issues such as fetal growth restriction, anemia, or gestational hypertension before they become emergencies.

Common lab tests at a third‑trimester prenatal appointment

Beyond the routine urine dipstick, many clinicians order a panel of blood tests that may include:

• Complete blood count (CBC) – checks for anemia.
• Iron studies – ferritin and transferrin saturation if anemia is suspected.
• Thyroid‑stimulating hormone (TSH) – especially if you have a history of thyroid disease.
• Rubella immunity – if not already confirmed earlier in pregnancy.
• Hepatitis B surface antigen – for maternal‑to‑infant transmission risk.

These labs are usually drawn at 28‑weeks or 32‑weeks visits, and results guide nutritional supplementation or medication adjustments.

How often should I have third trimester prenatal appointments?

If you’re considered low‑risk, the two‑week interval usually starts at 28 weeks. Once you reach 36 weeks, most providers shift to weekly visits to monitor for signs of labor, placental insufficiency, or blood‑pressure spikes.

High‑risk pregnancies—such as those with pre‑eclampsia, diabetes, multiple gestation, or a history of preterm birth—may see visits every week even earlier, sometimes as often as twice a week. Your care team will tailor the schedule based on your individual risk profile.

Third trimester prenatal visit schedule weeks 28 32 36

Here’s a quick snapshot of what typically happens at each milestone:

• 28 weeks – Comprehensive labs, growth ultrasound, and counseling on fetal movement tracking.
• 32 weeks – Repeat blood pressure check, fundal height measurement, and discussion of birth plan.
• 36 weeks – Weekly visits begin; provider assesses cervical readiness, reviews GBS results, and may order a biophysical profile.

Signs that indicate a problem during third trimester checkups

Most third‑trimester visits are routine, but certain signs should trigger immediate attention. The following symptoms are red flags that warrant a call to your provider or a trip to the labor and delivery unit:

• Sudden, severe swelling (especially in the face or hands) that doesn’t improve with rest.
• Sharp abdominal pain, especially if it’s persistent or accompanied by bleeding.
• Headache that doesn’t go away with rest or over-the-counter pain relievers.
• Vision changes—blurred vision, flashing lights, or temporary loss of sight.
• Decreased fetal movements (fewer than 10 kicks in a two‑hour window).
• Fever ≥ 100.4 °F (38 °C) without an obvious source.
• Shortness of breath that feels out of proportion to normal pregnancy‑related breathlessness.

If any of these arise, call your provider right away. In many cases, early evaluation can prevent serious complications.

Third trimester checkup symptoms that require immediate care

Beyond the red‑flag list, the following symptoms—while not always emergencies—should still be reported promptly:

• Persistent vomiting or inability to keep fluids down.
• Severe back pain that does not improve with positioning.
• New‑onset swelling of the legs that does not subside after lying down.

What to expect at a 32‑week prenatal visit

At the 32‑week mark you’re roughly seven months along, and the baby is about the size of a squash. Your provider will focus on confirming continued growth and preparing you for the final stretch.

Typical components of the 32‑week visit:

1. Vitals – Blood pressure, pulse, and temperature.
2. Weight and fundal height – Documenting trends.
3. Fetal heartbeat – Using a Doppler; you’ll hear the “whoosh” again.
4. Urine dipstick – Checks for protein and glucose.
5. Blood work – If not done at 28 weeks, CBC and iron studies may be repeated.
6. Discussion of birth plan – Review of preferred hospital, pain‑management options, and who will be present.
7. Vaccinations – If you haven’t received the flu shot or Tdap (tetanus, diphtheria, pertussis) this season, they may be offered.

Many clinicians also ask you to start daily fetal movement counting if you haven’t already. A simple “kick count”—10 movements within two hours—helps you monitor your baby’s wellbeing between visits.

Difference between routine checkup and high‑risk third trimester appointments

Most pregnancies follow a low‑risk trajectory, meaning the standard schedule and tests are sufficient. High‑risk pregnancies, however, require additional surveillance.

Routine (low‑risk) visit focuses on:

• Blood pressure, weight, fundal height, fetal heartbeat.
• Standard labs (CBC, urine dipstick).
• Discussion of common discomforts and birth planning.

High‑risk visit may add:

• More frequent blood pressure monitoring, sometimes with home cuff readings.
• Additional ultrasounds—e.g., growth scans every 4 weeks, Doppler studies of umbilical flow.
• Biophysical profiles or non‑stress tests (NST) to assess fetal oxygenation.
• Specialist referrals (maternal‑fetal medicine, endocrinology).
• Medication adjustments (e.g., low‑dose aspirin for pre‑eclampsia prevention).

Both types of visits include the same core measurements, but high‑risk care layers on extra testing to catch problems earlier. Your provider will explain any added procedures and why they’re needed.

Recommended blood work in third trimester pregnancy visits

Blood work in the third trimester is more targeted than early‑pregnancy labs. The following tests are most commonly ordered, often at the 28‑ or 32‑week visit:

These labs help clinicians manage anemia, prevent infections, and prepare for delivery. If any results are abnormal, your provider may prescribe iron supplements, adjust thyroid medication, or arrange a specialist consult.

How to prepare for your third trimester ultrasound

Ultrasound in the third trimester serves two main purposes: confirming fetal growth and checking placental position. Here’s how to get the most out of the exam:

1. Hydrate – Drink a glass of water about an hour before the scan; a full bladder improves image quality.
2. Wear comfortable clothing – Loose‑fitting tops make it easier for the technician to access your abdomen.
3. Bring a list of questions – Common queries include “Is the baby’s weight on track?” and “Is the placenta still anterior?”
4. Plan for a short wait – Scans often run 20–30 minutes; bring a book or headphones.
5. Consider a support person – Having a partner or friend can ease anxiety and help remember the provider’s explanations.

During the scan you’ll likely see measurements such as head circumference, abdominal circumference, and femur length. The technician will also assess the amniotic fluid volume and the position of the placenta (e.g., anterior, posterior, or low‑lying). If the placenta covers the cervical opening, that’s called placenta previa and may affect delivery planning.

When to call the doctor after a third trimester checkup

Even after a reassuring appointment, new symptoms can arise. Call your provider promptly if you experience any of the following:

• Sudden swelling of the hands, face, or eyes that doesn’t lessen with elevation.
• Persistent headache, especially if accompanied by visual changes.
• Any vaginal bleeding or fluid loss.
• Less than 10 fetal movements in a two‑hour period.
• Severe or worsening abdominal pain.
• Shortness of breath that feels unusual or is accompanied by chest pain.

When you call, describe the symptom, when it started, and any associated factors (e.g., recent activity, meals, position changes). Your provider will guide you on whether to come in for an urgent evaluation or monitor at home.

From our medical team: Third‑trimester visits are designed to keep both you and your baby safe. Most concerns can be managed with simple lifestyle tweaks—like elevating swollen legs or adjusting your sleep position—but never ignore sudden or severe symptoms. If you’re ever unsure, a quick phone call to your obstetrician can provide peace of mind and, if needed, timely care.

Myth vs. fact

Myth: You only need to see your doctor once a month in the third trimester.
Fact: ACOG recommends visits every two weeks after 28 weeks and weekly after 36 weeks for most pregnancies.

Myth: Swelling is always harmless and just a normal part of pregnancy.
Fact: Mild swelling can be typical, but sudden or severe swelling—especially of the face—may signal pre‑eclampsia and warrants immediate evaluation.

Myth: If you feel shortness of breath, it’s just the baby pressing on your lungs.
Fact: While mild breathlessness is common, sudden or severe shortness of breath can indicate anemia, pulmonary issues, or cardiovascular strain and should be discussed with your provider.

Key takeaways

• Third‑trimester visits become bi‑weekly at 28 weeks, then weekly after 36 weeks.
• Core measurements include blood pressure, fundal height, fetal heartbeat, and weight.
• Standard labs: CBC, iron studies, urine dipstick, and a GBS swab at 35‑37 weeks.
• High‑risk pregnancies may need extra ultrasounds, NSTs, or specialist referrals.
• Watch for red‑flag symptoms—sudden swelling, severe pain, bleeding, or reduced fetal movements—and call your provider immediately.
• Prepare for ultrasounds by staying hydrated, wearing comfortable clothing, and bringing a question list.
• Most insurance plans cover routine third‑trimester visits; check your policy for any co‑pays or prior‑authorization requirements.

Frequently asked questions

How many prenatal visits are recommended in the third trimester?

Most guidelines suggest visits every two weeks from 28 weeks to 36 weeks, then weekly until delivery, totaling roughly 6‑8 appointments.

What tests are performed at a 36‑week prenatal appointment?

A 36‑week visit typically includes blood pressure, weight, fundal height, fetal heart rate, urine dipstick, and a discussion of labor signs; many providers also perform a biophysical profile or non‑stress test at this stage.

Is it normal to feel shortness of breath during third trimester checkups?

Mild breathlessness is common as the uterus expands, but sudden or severe shortness of breath should be reported, as it can indicate anemia or cardiovascular strain.

When should I start monitoring my baby's movements daily?

Most clinicians advise starting kick counts around 28 weeks; aim for at least 10 movements in a two‑hour window and report any significant drop.

What should I bring to my third trimester prenatal appointment?

Bring your insurance card, a list of any new symptoms, a log of fetal movements, a water bottle (for ultrasound), and any questions about your birth plan or medications.

Can I still exercise after my third trimester checkup?

Yes—unless your provider advises otherwise, low‑impact activities like walking, prenatal yoga, or swimming are generally safe and can help reduce swelling and back pain.

When to call your doctor

If you notice any of the following, contact your obstetrician or midwife right away:

• Sudden swelling of the face, hands, or eyes.
• Severe or persistent abdominal pain.
• Vaginal bleeding or a gush of fluid.
• Marked decrease in fetal movements (fewer than 10 kicks in two hours).
• Headache with visual disturbances.
• Shortness of breath with chest pain or palpitations.

These signs may indicate pre‑eclampsia, preterm labor, or other complications that need prompt evaluation. This article is for informational purposes only and does not replace personalized medical advice. Always discuss your specific situation with your health‑care provider.

References

1. American College of Obstetricians and Gynecologists. “Routine Prenatal Care.” ACOG Practice Bulletin No. 226, 2023.
2. National Institute for Health and Care Excellence. “Antenatal Care.” NICE Guideline NG192, 2022.
3. Centers for Disease Control and Prevention. “Group B Streptococcus (GBS) Guidelines for Pregnant Women.” Updated 2023.
4. World Health Organization. “WHO Recommendations on Antenatal Care for a Positive Pregnancy Experience.” 2022.
5. Mayo Clinic. “Prenatal care: What to expect.” Accessed July 2026.
6. Royal College of Obstetricians and Gynaecologists. “Management of Pre‑eclampsia.” RCOG Green‑top Guideline No. 52, 2021.
7. National Health Service (UK). “Pregnancy: what to expect each week.” NHS website, 2024.
8. U.S. Food and Drug Administration. “Pregnancy and Lactation Labeling Rule (PLLR).” 2023.