Antenatal program Flashcards
When is the booking visit?
8-12 weeks (normally 12 weeks)
When is the growth and anomaly scan?
18-20 weeks
When is anti - D given?
28 and 34 weeks.
When is the tripe test performed?
11-13+6
When can the nuchal thickness be measured, what is it a marker of/
Can be measured from 11-13+6 weeks.
A marker in the Downs screening program.
When is an OGTT done/
28 weeks.
What is used to estimate gestational age?
Crown rump length.
What does the downs triple test incorporate?
The nuchal thickness.
Maternal age
Serum levels of PAPPA and HCG
If >1:250, offer confirmatory testing.
Is hcg High or low in downs’
HCG is high
Inhibin A is also high
What hormones are low in downs?
AFP, PAPPA and estriol.
What would signify twins?
high AFP.
Congenital malformations hormone
High AFP.
Amniocentesis > 15 weeks.
1% miscarriage risk
CVS 12 weeks
2% miscarriage risk.
What genetic test is targeted?
FISH
What genetic tests lets you look at the whole genome?
Array CGH (comparative genomic hybridisation)