Diagnosis of Down syndrome at 11 weeks is best assessed by:
Confirmatory test for Down's syndrome: 1. First trimester- Chorionic villous sampling(10-13th week) 2. Second trimester - Amniocentesis(16-18th week)
Ultrasonography
Aminocentesis
Chronic villous biopsy
Dopper Ultrasound
Intra Uterine Growth Restriction, Intrapaum and Antepaum Fetal Surviellance