First trimester prenatal screening Flashcards
1
Q
Biochemical markers for aneuploidy
A
PAPPA, free BHCG
2
Q
Maternal serum screen (MSS) performed when
A
between 11w2-13w6
3
Q
We see an decrease in PAPPA and BHCG in T21, 18, 13 with the exception of
A
BHCG increased with T21
4
Q
NIPT
A
maternal blood testing (AKA harmony)
5
Q
CVS
A
done between 10-12 weeks sampling trophoblastic tissue
6
Q
Amniocentesis
A
15-20 weeks preferred
