Available at these locations in Alberta:

Grande Prairie

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Second Trimester Anatomic Screen

Detailed Obstetrical Ultrasound

A detailed obstetrical ultrasound is performed during the second trimester of pregnancy, after the 18 week mark. This exam uses ultrasound pulsing to evaluate the condition of your baby and the position of the placenta and includes a head-to-toe examination of your baby’s abdominal organs and the heart, arms, hands, legs, feet, eyes, nose, lips and the brain anatomy.

Measurements will be taken to determine your baby’s size and the number of weeks since conception; most pregnancies have a gestation period of 40 weeks. The amount of amniotic fluid and position of the placenta will also be evaluated during this exam.


Special Instructions

  • Take all prescription medications as instructed
  • Many of these exams require a full bladder and it’s important to let your practitioner know if this makes you uncomfortable. If you have problems keeping a full bladder, you may arrive early to drink your water at the clinic
  • You should empty your bladder 90 minutes prior to your appointment
  • Drink 1 liter of water and have a snack between 90 and 60 minutes prior to your appointment
  • Should you be uncomfortable with such a full bladder, you may relieve your bladder of a small amount of urine but not all
  • Your skin should be kept clean and free of body oils, moisturizers and powders
  • Your clothing should be lightweight, comfortable and suitable for easy access to the skin of the area in question
  • Please arrive at least 15 minutes in advance
  • Once the exam is underway, your sonographer will inform you as soon as you may empty your bladder partially or totally, as we understand that a full bladder can be uncomfortable


  • Due to the status of the current covid-19 outbreak, we are regrettably only able to permit 1 guest at the conclusion of your exam.  Please provide a reliable method of contact for your guest when booking your appointment.  Your guest must be negative for signs of symptoms of covid-19 and wait outside the facility until the Technologist is ready for their arrival.  Your guest will then receive a phone-call and further instruction from Shift Imaging Personnel.
  • You may be asked to change into a gown, to give the sonographer better access to the skin of your uterine area
  • A warm, fragrance-free, hypoallergenic gel will be applied to the skin near your uterus and stomach
  • A wand-like transducer will be moved over the lubricated surface of your stomach area, in order to locate the fetus and capture images of your baby
  • Some pressure may be applied with the wand, in order to accurately measure your baby’s head, abdomen and leg bones and correlate your date
  • The amount of amniotic fluid will be assessed
  • The length of your exam will depend on how active your baby is, as well as its positioning
  • Be sure to let your practitioner know, should you have trouble holding your bladder at any time during the course of this exam
  • Be sure to let the practitioner know, should you need to move into a more comfortable position at any time during this exam
  • Your sonographer will endeavor to complete this exam in a timely manner, with the results and images to be discussed at the end of the ultrasound


Our radiologists will interpret your information and aim to forward the results to your doctor by the end of the next working day.


This exam is covered under the Alberta Health Care Plan.