Early pregnancy (dating) scan
About 6 to 9 weeks
Confirms the pregnancy is in the womb, checks the heartbeat and the number of babies, and dates the pregnancy.
Free patient tool
When are my pregnancy scans due?
Enter the first day of your last period, or your due date, to see your estimated due date, how far along you are, and the usual dates for each pregnancy scan. You can save the dates to your phone’s calendar.
Nothing you enter here is saved or sent. No cookies, no storage of your answers, no network calls: it all stays in your browser.
Medically reviewed by Dr. Akanksha Bajpai on 12 November 2026
PCPNDT: Sex determination of the foetus is prohibited by law under the PCPNDT Act. It is not done or disclosed at this centre.
If you have bleeding, severe pain, leaking fluid or the baby is moving less, contact your doctor or a hospital at once. Do not wait for a scan date.
Work out your scan dates
Your pregnancy scan dates
These dates are estimates from your last period. Your doctor may change your due date after the first scan; then use the due date your doctor gives you.
Downloads a calendar file made on your phone, with a reminder on the first day of each window. Nothing is sent anywhere.
General information only, not medical advice. Your doctor decides which scans you need and when.
The usual pregnancy scans
NT scan (11–14 week scan)
11 weeks 0 days to 13 weeks 6 days
Measures the fluid at the back of the baby’s neck (nuchal translucency) and checks early development. With a blood test, it is part of screening for some chromosomal conditions. It can only be done in this window.
Anomaly scan (level 2 / TIFFA)
About 18 to 22 weeks
A detailed check of the baby’s organs, growth, the placenta and the fluid around the baby.
Growth scan (third trimester)
From about 28 weeks, as your doctor advises
Checks the baby’s growth, position, the fluid and the placenta. Your doctor decides if and when you need one, sometimes with a Doppler.
Pregnancy scans: when to have each one
How is the due date worked out?
By adding 280 days (40 weeks) to the first day of your last period. This assumes a regular 28-day cycle; the first scan can correct it.
When is the NT scan done?
Between 11 weeks 0 days and 13 weeks 6 days. It cannot be done later, so book it early.
When is the anomaly (level 2) scan done?
Usually between about 18 and 22 weeks, as your doctor advises.
How many ultrasounds are needed in pregnancy?
It varies. Many pregnancies have a dating scan, an NT scan and an anomaly scan, with growth scans later if the doctor advises. Your doctor decides.
Is ultrasound safe in pregnancy?
Ultrasound uses sound waves, not X-rays, and is widely used in pregnancy when a doctor advises it.