Chapter 14 Flashcards
Prenatal Testing and NTD.
For what is Nuchal Translucency Test use for?
To test for All 3 types of Trisomies (13,18&21)
High levels of Inhibin A indicate what?
Down Syndrome
What do high and low levels of AFP indicate?
High levels indicate NTDs and Low levels indicate + All 3 trisomies
What do high and low levels of Free Beta HCG indicate?
High levels indicate Down Syndrome and low levels indicate trisomies 13 and 18
What do low levels of PAPP-A indicate?
+ for all 3 trisomies
What do low levels of UE3 indicate?
+ for all 3 trisomies
At what time is Amniocentesis performed?
15-16 weeks
What type of testing can be drawn from Amniocentesis fluid extract?
Karyotyping, DNA testing & AFP from fetal urine
What is the risk of miscarriage from performing an Amniocentesis?
1%
At what time is Chorionic Villus Sampling performed?
10-12 weeks
How is Chorionic Villus Sampling performed?
Transcervical or Transabdominal needle
What is the fluid type obtained in a Chorionic Villus Sampling?
Fetal trophoblastic cells
What is the risk of miscarriage from performing a Chorionic Villus Sampling?
1%
What is the risk of miscarriage from performing a Maternal Serum Screening?
No risk to fetus
When is Maternal Serum collected for screening?
16 weeks
