Not your ordinary 1970 2D ultrasound where it was used to only examine
the fetus, assess amniotic fluid and look for birth defects, among other
things! The more-detailed 3D and 4D ultrasounds are performed to
closely examine suspected fetal anomalies, such as cleft lip and spinal
cord issues, or to monitor something specific.
3D ultrasound uses
sound waves and multiple two-dimensional images that are taken at
various angles and then placed together to form a three-dimensional
rendering of your baby in your womb. So, instead of seeing just a
profile view of your baby’s face, you are able to see the whole surface
(a regular photo). 4D ultrasound is similar, but the image shows
movement (like a video). Where you are able to see your baby doing
things in real time (like opening and closing his eyes, yawing, smiling
or even sucking his/her thumb).
As exciting as it may be to hear
your baby's heartbeat and see your baby in action, 3D/4D ultrasounds
are only officially recommended when your practitioner deems them
necessary for medical reasons (they are not a part of a routine prenatal
exam). Remember, there will be plenty of opportunities to take photos
and make memories when your baby is born. In the meantime, keep
ultrasounds to a minimum and look forward to the day you can see your
baby in person (no technology necessary!)