Maternity Screening

Question 1

When does neuro tube close?

Answer 1

Around 26 days - 6 weeks

Question 2

Screening tools for fetal anomaly

Answer 2

Maternal age
Blood tests
U/S

Question 3

Prevalence of trisomy 21

Answer 3

around 1:500

Question 4

Chance of having a baby with a congenital anomaly

Answer 4

4%

Question 5

4 things to test for 2nd trimester tests, when take?

Answer 5

Inhibin-A
alpha fetal protein (used to be for NTDs)
BHcG
Estriol
Maternal age
Between 15-20 weeks

Question 6

Maternal age cut off for Down syndrome?

Answer 6

37

Question 7

Offering test to someone who wants to know trisomy 21 but won’t terminate if found out?

Answer 7

Risk of miscarriage due to invasive testing

Question 8

1st trimester screening for T21?

Answer 8

Unchallenged translucency at 11-14 weeks
PAPP-A
Free BhCG
Plus maternal age

Question 9

Amniocentesis, fetal cells come from?

Answer 9

Skin, gut, urinary tract. May not pick up mosaicism in the gonads for example.

Question 10

Current Victorian Legislation on Abortion?

Answer 10

Can abort prior to 24 weeks
If more than 24 weeks:
-practitioner thinking is appropriate
-consults with another doctor
-abortion is appropriate for circumstances:
-medical circumstances
-woman’s current, future physical, psych, social circumstances