Ultrasound Baby Scans

Early Dating Scan (6–10 weeks)

The purpose of an Early Dating Scan is to:

  • Confirm that your baby is developing normally in the first trimester of pregnancy
  • Date your pregnancy in order to estimate when your baby is due
  • Reveal if you are carrying one baby, twins or more
  • Detect your baby’s heartbeat
  • Rule out the possibility of an ectopic pregnancy
  • Confirm that the baby is developing in the correct place within the uterus
  • An Early Dating Scan is particularly beneficial if you have previously miscarried or experienced bleeding. Depending on the position of your uterus, a trans-vaginal scan may be required.

Nuchal Scan (11–13 weeks)

  • The purpose of a Nuchal Scan is to:
  • Allow the sonographer to measure the volume of translucent fluid in the space behind your baby’s neck
  • Estimate your baby’s risk of having chromosomal abnormalities such as Downs Syndrome, Edwards, Patau and Turner Syndrome
  • Determine whether more invasive diagnostic testing, such as CVS or Amniocentesis is necessary
  • Examine your baby’s heart in greater detail
  • Determine your baby’s sex (in around 70% of cases)

A routine blood test is also taken during this scan. For more information on Amniocentesis or CVS please see:

Anomaly Scan (17–24 weeks)

The purpose of an Anomaly Scan is to:

  • Check that your baby is developing normally at the mid pregnancy stage
  • Look at where the placenta is lying in your uterus
  • Take various measurements to make sure that your baby’s growth is on track
  • Check all your baby’s body parts for conditions such as cleft lip and palate, spina bifida, and any abnormalities of the brain, heart and other organs
  • Determine your baby’s sex if it couldn’t be determined during the nuchal scan

An Anomaly Scan is a wonderful event as it allows you to see your baby’s face, limbs, hands, feet and heartbeat for the first time.

Wellbeing Growth Scan (24–42 weeks)

  • The purpose of a Wellbeing Growth Scan is to:
  • Determine the growth and health of the baby by taking body measurements and estimating his / her weight
  • Measure the amount of amniotic fluid surrounding your baby
  • Assess the blood flow from the placenta to your baby by Doppler ultrasound
  • Assess the position in which your baby is lying in the womb, i.e. posterior or breech
  • Check the placental position and appearance
  • Examine the movements of the baby

The Office

Chelsea Birth Clinic
266 Fulham Road, London SW10 9PJ

0207 349 5204


The Clinic

The Women’s Wellness Centre
274-276 Fulham Road, London SW10 9EW

020 7751 4488


The Kensington Wing

Chelsea and Westminster Hospital
369 Fulham Road, London SW10 9NH

020 3315 8616/18 (24 hours)


Your Pregnancy Doctor


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