Antenatal Clinic Flashcards
(36 cards)
When is a booking clinic?
Before 10 weeks
When is a dating clinic?
10-13+6 weeks
When is an anomaly scan?
18-20+6 weeks
When do you do an oral glucose tolerance test for gestational diabetes?
24-28 weeks
When do you give anti-D in Rhesus negative women?
28 and 34 weeks
When do you do an additional scan for placenta praevia?
32 weeks
When do you scan for presentation?
36+ weeks
When do you give the whooping cough vaccine?
16 weeks
What is the combined (trisomy) test composed of?
Ultrasound scan for nuchal translucency (1.6-2.4mm)
beta-HCG (high indicates high risk)
Pregnancy associated plasma protein-A (PAPP-A) (low indicates high risk)
Does a high or low b-HCG suggest high risk of trisomy?
High
Does a high or low PAPP-A suggest high risk of trisomy?
Low
When is the combined (trisomy) test done?
11-14 weeks
When is the triple (trisomy) test done?
14-20 weeks
What is the triple (trisomy) test comprised of?
b-HCG (high suggests high risk) Alpha fetoprotein (low suggests high risk) Serum oestriol (low suggests high risk)
Does a high or low alpha fetoprotein (AFP) suggest high risk of trisomy?
Low
Does a high or a low serum oestriol suggest high risk of trisomy?
Low
When is the quadruple (trisomy) test performed?
14-20 weeks
What is the quadruple (trisomy) test comprised of?
b-HCG (high suggests high risk) Alpha fetoprotein (low suggests high risk) Serum oestriol (low suggests high risk) Inhibin A (high suggests high risk)
What is amniocentesis?
An ultrasound-guided needle is used to take a sample of amniotic fluid. This is then tested for chromosomal abnormalities.
When can amniocentesis be performed?
When a foetus is deemed high risk on a combined/triple/quadruple screening (more than 1/150) and is between 15-20 weeks gestation.
What is chorionic villus sampling?
An ultrasound-guided biopsy of placental tissue to test for chromosomal abnormalities.
When can chorionic villus sampling (CVS) be performed?
Under 15 weeks
What is non-invasive prenatal testing (NIPT)?
A blood test using the mother’s blood. This can be done as the mother’s blood will contain DNA of the placental tissue which is representative of the foetus DNA.
What is Edward’s syndrome?
Trisomy 18
