Ante Natal Tests Flashcards
0
Q
Anomaly scan
A
18wks
1
Q
Dating scan
A
12wks: 11+0 - 13+6
2
Q
Alpha-fetoprotein (AFP)
A
Maternal AFP measured at 17wks.
Increased in open NTD, twins, Turners syndrome, other adverse outcomes.
Decreased in down’s syndrome, diabetic mothers
3
Q
Amniocentesis
A
At 16wks
Fetal loss rate is 1%
4
Q
Chorionic villus biopsy
A
At 10-20wks
Fetal loss rate is 4%
5
Q
The combined test
A
Nuchal translucency
Free HCG
Pregnancy associated plasma protein-A
Woman’s age
10+3 - 13+6
6
Q
The integrated test
A
Better than combined test but have to wait for second trimester results.
1st trimester nuchal translucency
1st trimester PrPP-A
Second trimester quadruple test
7
Q
Quadruple test
A
Maternal AFP Unconjugated esteriol HCG InhibinA Maternal age
Use 15 to 20 weeks or of present in second trimester
