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Screens & Tests ( 3rd Trimester)

Screens & Tests ( 3rd Trimester)

The third trimester, spanning from weeks 29 to 40, is a critical time for both mother and baby. As you approach delivery, your doctor will perform a series of important tests and screenings to assess the baby’s position, growth, and well-being, as well as to monitor the mother for any late-developing complications.

Key Screenings & 3rd Trimester Tests

  1. Growth Scan / Ultrasound
    ● Usually done between 32–36 weeks
    ● Assesses baby’s position, growth, weight estimate, fluid levels (amniotic fluid), and placenta placement
  2. Fetal Non-Stress Test (NST)
    ● Monitors fetal heartbeat and movement
    ● Often recommended if there are concerns about fetal well-being, decreased movements, or in high-risk pregnancies
  3. Biophysical Profile (BPP)
    ● Combines ultrasound and NST to check fetal breathing, movement, muscle tone, and amniotic fluid levels
  4. Group B Streptococcus (GBS) Screening
    ● Done between 35–37 weeks
    ● A vaginal and rectal swab to check for GBS bacteria, which can be passed to the baby during delivery
    ● If positive, IV antibiotics are given during labor to prevent infection in the newborn
  5. Blood Pressure & Urine Tests
    ● Continued at every visit to detect preeclampsia (a condition marked by high blood pressure and protein in urine)
  6. Repeat Hemoglobin / CBC
    ● Done to check for anemia or any other blood-related concerns before delivery
  7. Blood Sugar Monitoring (if required)
    ● For those previously diagnosed with gestational diabetes, blood sugar levels may be monitored to ensure control
  8. Internal (Pelvic) Exam (Towards the End)
    ● Around 37 weeks onward, your doctor may check for cervical dilation and effacement as signs of early labor

Optional/Additional Tests


● Doppler Ultrasound (in high-risk pregnancies) to assess blood flow to the baby and placenta
● Rh Antibody Testing (for Rh-negative mothers)
At Borneo Mother & Child Hospital, we ensure that all third-trimester screenings are performed with utmost care, using advanced fetal monitoring technology. We guide you through each test and explain what the results mean—so you feel confident, informed, and ready for a safe delivery.

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