Preparation for dating scan
Sometimes 3D or even 4D ultrasound technology is used instead of 2D.To get the most comprehensive anatomy assessment, the sonographer will be aiming for many different views from lots of different angles.
If you're concerned about the upcoming picture show (and what those grainy images reveal), talk to your practitioner about what he or she is looking for.The scan uses ultrasound to screen for Down syndrome, or other chromosomal or inherited conditions in the foetus.Other non-chromosomal conditions, such as neural tube defects, abdominal wall defects, limb abnormalities and some congenital heart disease, can also be detected at this stage of the pregnancy.Be aware that a level 2 ultrasound can also tell you the sex of your baby if you haven't already found out through noninvasive prenatal testing (NIPT) or a CVS, though with less than 100 percent reliability and depending on baby's cooperation.Remember: Be sure to tell your sonographer if you want to know!These days, it's pretty much routine for women in their second trimester to be scheduled for a level 2 ultrasound, commonly called the 20-week anatomy scan.
That's because practitioners have found that this special pregnancy ultrasound is a great way to see how a baby is developing and offer reassurance that everything is going exactly the way it should be.
When the technician gets a clear shot, he or she will freeze-frame the picture (that's the actual sonogram) and then measure a specific part of the body.
During the scan, you may be able to spot your baby's beating heart, the curve of the spine, and the face, arms and legs.
Your baby will be measured from crown to rump, around the middle, and around the head, and his or her weight will be estimated.
The four chambers of the heart will be looked at, as well as the kidneys, bladder, stomach, brain, spine and sex organs.
If you have a condition that needs to be monitored (such as carrying multiples), you may have more than one detailed ultrasound.