Antenatal Care and Screening

Question 1

How many antenatal meetings are normally made prior to 20 weeks gestation?

Answer 1

4

Question 2

What tests are usually done in an antenatal meeting?

Answer 2

Abdominal examination
Ultrasound
FBC, U&E, glucose
Rubella, syphilis
Antibodies (Rhesus)

Question 3

What markers are used to estimate gestational age?

Answer 3

Biparietal diameter (crown-rump length)
Femur length

Question 4

What is “foetal lie”?

Answer 4

Relation of foetal spine to maternal spine
Longitudinal lie: parallel to maternal spine
Transverse lie: horizontal to maternal spine

Question 5

What is “foetal engagement”?

Answer 5

Relation of foetal head to pelvic rim

Question 6

Which scan is used to screen for foetal anomaly?

Answer 6

Ultrasound

Question 7

What tests can be used to detect the risk of Down’s syndrome in 1st trimester?

Answer 7

Skin thickness behind foetal neck (Nuchal thickness)
bHCG and PAPP-A levels

Question 8

What tests can be used to detect the risk of Down’s syndrome in 2nd trimester?

Answer 8

Blood sample
HCG and AFP levels

Question 9

Low AFP and high HCG increases/decreases risk of Down’s syndrome

Answer 9

Low AFP and high HCG increases risk of Down’s syndrome

Question 10

High AFP and low HCG is associated with increased risk of what particular foetal anomaly?

Answer 10

Spina bifida

Question 11

What are the 2 main specific diagnostic tests that can be done for foetal karyotyping?

Answer 11

Amniocentesis
Chorionic villus sampling