Using a panel of ultrasound markers in a systematic fashion as a part of screening has been referred to as a "genetic sonogram". The presence of one of these markers may increase the possibility of Down syndrome.
Edwards Syndrome (Trisomy 18) Trisomies occur when there is a triplet of a specific chromosome instead of the normal number of 2. The most common trisomy is trisomy 21 or Down syndrome. In Edwards syndrome, or trisomy 18, there are 3 chromosome 18's. Patients with trisomy 18 can range from mildly to severely affected.
Marfan Syndrome is a disorder of the connective tissue that affects the skeletal & cardiovascular systems as well as the eyes & skin. It is caused by a defect in the fibrillin-1 gene. The long bones of the body grow too much, among other effects on the body.