Importance of Ultrasound Scans During Pregnancy

Most people think of a pregnancy scan as the moment they first see their baby on a screen. That part is genuinely special. But an Ultrasound Scan during pregnancy does a great deal more than give you a picture to take home. Your doctor uses it to confirm your due date, track your baby's growth, check the position of the placenta, and catch anything that needs early attention.

The scans are safe, painless, and use sound waves rather than radiation. Read on to understand what each scan is actually checking, when they happen, and what to expect when you go in.

What Is a Pregnancy Ultrasound and How It Works?

A pregnancy ultrasound creates live images of your baby using sound waves. No radiation is involved, no needles, and nothing that causes discomfort. Here’s what you can expect during the ultrasound: 

• A small device called a transducer is placed on your skin. 
• It sends sound waves into your body, which bounce off your baby, the placenta, and the fluid surrounding your baby. 
• Those waves return as signals, and a computer turns them into the image you see on screen. The image is live. 
• You can even watch your baby moving in real time.
• Your doctor looks at the same screen and walks you through what they are seeing as the scan progresses. That conversation is part of the appointment.

What Do Pregnancy Ultrasound Scans Actually Check?

A scan gives your doctor a detailed, real-time look at several aspects of your baby's health and the state of your pregnancy. Here is what an ultrasound scan can show:

• Pregnancy inside the uterus, ruling out ectopic pregnancy (when the embryo grows in the fallopian tube instead, which requires immediate medical attention).
• Baby's gestational age and estimated due date from their measurements.
• Your baby's heart rate, movement, and position.
• Placenta's size and location, and measures the amniotic fluid surrounding your baby.
• Baby's brain, spine, heart, kidneys, and limbs.
• Chromosomal conditions like Down syndrome, when paired with a blood test.

How Many Scans Will You Need and When?

Most uncomplicated pregnancies include two scheduled scans. Your doctor will suggest more if something needs closer monitoring. Here is how the timing usually works:

First Trimester Scan (7 to 14 Weeks)

Your first ultrasound scan is usually done between 7 and 12 weeks. In the early weeks, a transvaginal scan may be used. A small device placed gently inside the vagina gives a clearer image before a bump has formed.

This scan confirms a heartbeat, verifies the pregnancy is in the right location, and gives your doctor an accurate due date based on your baby's size. Between 11 and 14 weeks, a nuchal translucency scan may also be offered. This measures a small patch of fluid at the back of your baby's neck. Combined with a blood test, it gives your doctor an early read on the risk of chromosomal conditions like Down syndrome.

Anatomy Scan (18 to 20 Weeks)

This is the most detailed scan of your entire pregnancy. Your sonographer (a trained imaging specialist) checks every major organ of your baby. For most parents, it is the scan they remember most. It is often the first time they see their baby's face clearly.

The scan looks at your baby's brain, spine, heart, kidneys, and limbs. It also checks the position of the placenta and the amount of amniotic fluid. If you want to know your baby's sex, this is the scan where that becomes visible. Most results are completely reassuring. When something needs a closer look, your doctor explains exactly what they have seen and what comes next.

Growth Scans (28 Weeks Onwards)

In the third trimester, growth scans track your baby's size and position as the due date gets closer. These are typically offered around 28 to 32 weeks. Women managing conditions like pregnancy induced hypertension or gestational diabetes are offered additional growth scans so any changes are caught early and managed well.

What Are the Different Types of Pregnancy Ultrasound?

Each type of scan during pregnancy has a specific clinical purpose. Your gynaecologist recommends the type of scan based on what they need to see and how far along you are. 

What Should You Expect on the Day of the Scan?

A pregnancy scan is calm and takes around 20 to 30 minutes. Here is what actually happens on the day. 

• You lie on a padded table and your sonographer applies a small amount of water based gel to your abdomen. 
• It conducts sound waves clearly and wipes off easily, though it can feel cool at first. 
• The sonographer moves a handheld device across your belly, takes measurements, and you watch the whole thing on screen. 
• For some scans, your doctor may ask you to arrive with a full bladder, as this produces clearer images. You can bring a partner or someone you trust.

Choose Apollo Clinic for Accurate Ultrasound Scan! 

A timely ultrasound scan gives you the confidence that your baby is growing well, and gives your doctor what they need to keep your pregnancy on the right track.

Apollo Clinic offers pregnancy ultrasound services across its centres in India, with trained sonographers and same-day consultations. Speak with a general physician near me at Apollo Clinic or visitApollo Clinic to book your scan today.

FAQs

1. How many ultrasound scans are needed during pregnancy?

Two Ultrasound Scans are standard for most pregnancies, one in the first trimester and the anatomy scan at 18 to 20 weeks. Your doctor may recommend more if any specific concerns arise during your pregnancy.

2. Are pregnancy ultrasound scans safe?

Yes, completely. They use sound waves, not radiation, and have no known harmful effects on mother or baby. They have been used safely in pregnancy care for decades.

3. Can a pregnancy scan screen for chromosomal conditions?

A nuchal translucency scan at 11 to 14 weeks, combined with a blood test, screens for conditions like Down syndrome. It is a risk estimate, not a diagnosis. Further tests are available if the result suggests a higher risk.

4. When can a scan show the baby's sex?

Your baby's sex is usually visible at the 18 to 20 week anatomy scan when they are in a clear position. Let your sonographer know before the scan begins if you would like to find out.