•
Advanced maternal age
•
NT Screening
•
First trimester biochemistry
•
Combined screen
•
Sequential Screen
•
Integrated Screen
•
2nd trimester biochemistry
•
2nd trimester genetic sonogram
•
2nd trimester biochemistry+ US
•
Everything
Biochemistry
Ultrasound
1
st
Tri
2
nd
Tri
Screening Options for Fetal Down Syndrome