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Different Types of Antenatal Scans: A Comprehensive Guide for Expectant Parents

Different Types of Antenatal Scans: A Comprehensive Guide for Expectant Parents

Antenatal scans play a vital role in ensuring the health and development of your baby. These non-invasive procedures use ultrasound technology to create images of the fetus, helping healthcare providers track progress from early stages to delivery.

Why Are Antenatal Scans Important?

  • Confirm pregnancy viability and location
  • Establish accurate due dates
  • Detect multiple pregnancies (twins, triplets)
  • Screen for chromosomal abnormalities
  • Monitor fetal growth and development
  • Check placenta position and amniotic fluid levels

1. Early Pregnancy / Dating Scan (5-11 weeks)

🎯 Purpose

Verify viability and location of pregnancy.

🔍 What It Checks

Pregnancy site, number of fetuses, heartbeat (110-160 bpm), uterine abnormalities.

⏱️ Duration:

15-30 minutes

2. Nuchal Translucency Scan (11-14 weeks)

🎯 Purpose

Early risk assessment for chromosomal issues like Down syndrome.

🔍 What It Checks

Crown-rump length, fluid behind neck, nasal bone, heart rate, blood flow.

⏱️ Duration:

20-40 minutes

3. Fetal Anomaly Scan (18-22 weeks)

🎯 Purpose

Thorough structural examination of the fetus.

🔍 What It Checks

Brain, spine, heart, limbs, abdomen, placenta position, amniotic fluid, cervix.

⏱️ Duration:

30-60 minutes (most detailed scan)

4. Growth Scan with Doppler (24-42 weeks)

🎯 Purpose

Monitor ongoing development and fetal health.

🔍 What It Checks

Fetal size, estimated weight, blood flow via Doppler, placenta maturity.

💡 3D/4D Scans

These can enhance any scan for clearer, more realistic images of your baby.

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