What is an Early Pregnancy Scan?
An Early Pregnancy Scan (also called Viability or Dating Scan) is a safe ultrasound examination performed between 6 and 10 weeks of gestation. It confirms the presence of a viable intrauterine pregnancy, estimates the gestational age, and checks for multiple pregnancies.
Why is it done?
- Confirm that the pregnancy is located inside the uterus (rules out ectopic pregnancy)
- Verify fetal heartbeat and viability
- Accurately date the pregnancy to calculate an estimated due date (EDD)
- Detect multiple gestations (twins or more)
- Evaluate early pregnancy complications (bleeding, pain)
When should I get it done?
The recommended window for an early pregnancy scan is between 6 weeks and 10 weeks + 6 days of pregnancy. Scanning before 6 weeks may not clearly show fetal structures, and after 10 weeks a detailed structural scan is preferred.
How is the scan performed?
- Transabdominal ultrasound: A gel-covered probe is moved over your lower abdomen
- Transvaginal ultrasound (if needed): A specialized probe gently inserted into the vagina provides clearer images in very early pregnancies
- You may need a moderately full bladder for better visualization during transabdominal scanning
What does it show?
- Gestational sac presence and size
- Yolk sac quality and size
- Fetal pole appearance and crown-rump length (CRL)
- Fetal heartbeat (normal rate between 90–110 bpm at 6–7 weeks, rising to 120–160 bpm by 9–10 weeks)
- Uterine and adnexal anatomy (check for ovarian cysts or masses)
Benefits and Limitations
Benefits:
- Non-invasive and safe with no radiation
- Provides reassurance about the viability and location of pregnancy
- Accurate dating helps guide prenatal care
Limitations:
- Imaging may be limited by maternal body habitus or inadequate bladder filling
- Cannot detect all early structural anomalies (reserved for later detailed scans)
- Transvaginal scan may cause mild discomfort
Frequently Asked Questions (FAQs)
Do I need to prepare for the scan?
Yes, for a transabdominal scan, drink 500 ml of water one hour before your appointment and avoid urinating.
Is it safe for my baby?
Yes. Ultrasound uses sound waves and is safe for both mother and fetus.
Will it hurt?
No. The procedure is painless, though a full bladder may cause mild discomfort.
How long does the scan take?
Typically 10–15 minutes.
When will I get the results?
Your sonographer will discuss findings immediately; a detailed report will follow within 1–2 days.
Can I have photos or video?
Most clinics provide printed images; ask your provider for options