Misc MFM

Question 1

When is ionizing radiation most teratogenic to the growing fetus?

Answer 1

8-15 weeks

Question 2

What is the threshold for “all or none” effect in RT exposure?

Answer 2

> 5 rads, <8 weeks

Question 3

What is the RT exposure of a barium enema?

Answer 3

4-5 rads

Question 4

Risk of placenta accreta with subsequent previas?

Answer 4

Risk of accreta in 1st, 2nd, 3rd… is: 3%, 11%, 40%, 61%, 67%

Question 5

What rx can cause fetal renal tubular dysplasia?

Answer 5

Ace inhibitors

Question 6

Asperger’s can result from exposure to which drug?

Answer 6

Valproate

Question 7

Lithium exposure in pregnancy can cause what?

Answer 7

Epstein’s anomaly - apical displacement of the TV of the heart

Question 8

1st TM screen tests?

Answer 8

At 11-14 weeks:
PappA
HCG
NT
Age

Question 9

2nd TM screen tests?

Answer 9

AFP
HCG
Estriol
Inhibin
Age

Question 10

Describe different two step screens

Answer 10

Contingent: 2nd TM testing is dependent on 1st TM results
Integrated: Single result in 2nd TM
Serum integrated: Single result in 2nd TM
Sequential: Results after both steps

Question 11

Difference between sequential and contingent testing

Answer 11

Contingent testing - low risk women do NOT get the 2nd TM testing (sequential testing they DO)