Early Pregnancy Ultrasound

An early pregnancy ultrasound, also known as a dating scan, is a medical imaging examination performed in the first trimester to confirm and monitor the progress of a pregnancy. These scans offer valuable information for both expectant parents and healthcare providers regarding the health and development of the embryo or fetus.

What the scan involves

For the abdominal ultrasound, you will be asked to drink water to fill your bladder, which helps to provide a clearer view of the pelvic organs and pregnancy. In some cases, a transvaginal ultrasound will also be also performed to obtain better views of the pelvic organs.

What the scan checks for

  • Pregnancy confirmation: Verifies the pregnancy is in the uterus and not outside the uterus
  • Heartbeat: Confirms the embryo is alive and growing by visualizing the fetal heartbeat, which should be visible from about six weeks onward.
  • Gestational age: Measures the embryo to accurately determine the number of weeks pregnant and calculate the estimated due date.
  • Multiple pregnancies: Determines if there is more than one baby, such as twins or triplets.
  • Uterine and ovarian health: Checks the uterus and ovaries for abnormalities like fibroids or cysts. 

When is it best performed

  • The scan is typically performed before 11 weeks, but ideally around 8 to 9 weeks to most accurately confirm the due date.
  • It can sometimes be performed as early as 6 weeks, but it’s not consistently possible to confirm fetal heart activity before this time.