Behind a Smile wrote:
Technically both optional.
The 12 week does the downs testing etc.
The 20 week one is gender identification etc I do believe
Both are optional. The 12 week one is the Nuchal Translucency (NT)which test for Down syndrome and the 19/20 week scan is the Morphology and looks at:
At this stage the sonographer or doctor can:
Confirm that the fetal heart is beating
Detect multiple pregnancies
Measure the fetal size
Assess the position of the placenta
Check the volume of amniotic fluid around the baby
Look for fetal abnormalities
I'm also attempting to post a table below that says what chances there are of certain things being picked up on the scan (sorry if it doesn't work):
As far as i know the 20week scan is the one you need, that is the on they do all the major measurements and making sure everything is in working order on bub. the hospital does this one.
I only had an early sacn at 13 weeks because of bleeding, so it was a suspected miscarriage. thankfully everything was good smile If you are age 35 or older they do offer a scan at 12 weeks to check for down syndrome.
The scan are generally offered to all pregnant women regardless of age but due to the increased risk of downs syndromes they are more highly recommended for older mothers. There is also a medicare rebate which is only applicable to women over 35 years of age.