How to Read Your Pregnancy Ultrasound Report (Without Panic)

Opening a pregnancy ultrasound report for the first time can feel overwhelming. There are abbreviations, numbers and measurements, often written in a style that seems more technical than human. This guide walks through the main sections you are likely to see, so you can understand the structure of the report without trying to self-diagnose.

Important: This is general information only. It cannot replace advice from your midwife, obstetrician or fertility team. Always discuss your own scan results with a healthcare professional who can interpret them in the context of your full medical history.

A quick view of the report layout

Most ultrasound reports, whether printed or in an online portal, follow a similar pattern. They usually include:

• Basic details about you and the scan.
• Information about gestational age and due date.
• Measurement tables.
• Free-text comments or conclusions written by the sonographer or doctor.

You do not need to understand every abbreviation on your own. The goal is to know where to look for the key pieces of information and what kinds of questions you can ask your care team.

Patient and scan details

Near the top, you will usually see basic identifying information:

• Your name and date of birth.
• A hospital or clinic number.
• The date of the scan.
• The type of scan (for example, “dating scan”, “routine first trimester scan”, “anatomy scan”).

This section is mostly administrative. Its job is to make sure the report clearly belongs to you and to record when and why the scan was performed.

Gestational age and due date lines

Somewhere near the top or just above the measurements, you may see lines like:

• GA 10+4 on 2026-08-01
• Gestational age: 12w3d
• EDD: 2027-03-10 (by ultrasound)

These lines tell you:

• How far along the pregnancy was at the time of the scan (gestational age).
• Which method was used to estimate the due date (for example, based on last menstrual period or based on ultrasound).

If the report says “EDD by ultrasound”, it means the due date shown has been adjusted to align with the measurements taken during the scan. This may differ slightly from your original LMP-based estimate.

Measurement table

A central part of the report is a table of measurements. In early pregnancy, this might include:

• CRL – crown–rump length (distance from the top of the head to the bottom of the spine).
• GS – gestational sac size.

Later in pregnancy, you might see:

• BPD – biparietal diameter (width of the head).
• HC – head circumference.
• AC – abdominal circumference.
• FL – femur length.

Alongside each measurement, there may be:

• A value in millimetres or centimetres.
• An estimated gestational age based on that measurement.
• Sometimes, a note about how the measurement compares with typical ranges.

The important thing to know is that these numbers are there for your healthcare team to track growth over time. On their own, they don’t tell the whole story, and they need to be interpreted in context by a professional.

Comments or conclusion section

Near the bottom, there is often a paragraph labelled “Comments”, “Impression” or “Conclusion”. This is where the person who performed or reviewed the scan summarises what they saw.

Common examples in uncomplicated situations might include phrases like:

• “Single live intrauterine pregnancy.”
• “Gestational age consistent with dates.”
• “No obvious abnormalities seen.”

If there is anything that needs follow-up, this section is also where your care team will note it and outline next steps. Because this language can be more clinical, it is a good place to focus your questions during your appointment.

Why reports can look more serious than they are

Ultrasound reports are written in a professional, standardised style because they are part of your medical record. That means they:

• Use formal language and abbreviations.
• Include details that are important for other clinicians, even if they seem odd or alarming to read as a patient.
• Document observations whether or not they are expected or concerning.

It is very easy to worry when you see a phrase you do not understand. This is one reason it is important to review reports with your care team rather than trying to decode everything alone.

How to use your report in appointments

If you have a printed copy or an online version of your report:

• Bring it to your next appointment or have it open on your phone.
• Highlight or note any lines you would like explained (for example, the gestational age line or a specific measurement).
• Ask your healthcare provider to walk you through the key parts and tell you which details matter most for your care.

You do not need to learn a new technical language to be an “informed” patient. Your role is to ask questions and share how you are feeling; your care team’s role is to interpret the report with you.

A gentle reminder

It is completely normal to feel anxious when reading medical documents, especially in pregnancy. Remember that:

• An ultrasound report is a tool for your healthcare team, not a test you must interpret alone.
• Many phrases and numbers are there for completeness rather than because something is wrong.
• If anything in a report worries you, the best next step is a conversation with your midwife or doctor, not a late-night search trying to decode every line.

SoftBump’s tools and articles are here to help you understand the structure of these documents so that, together with your care team, you can feel more grounded when you read them.