Antenatal Care

Question 1

What is the incidence of PIH in the general obstetric population?

Answer 1

4.2-7.7%

Question 2

antiphospholipid syndrome /antibodies are found in what percentage of recurrent miscarriages?

what % in gen population?

Answer 2

15%

Vs 2-3%

Question 3

Risk of congenital rubella syndrome if rubella is contracted <11/40

Answer 3

90%

20% if 11-20/40.
No published cases of CRS after 20/40

Question 4

Risk of spontaneous miscarriage if pt gets rubella in 1st trimester?

Answer 4

20%

Question 5

Incubation period of rubella

Answer 5

12-23 days (average =14 days)

Question 6

1) what % of twins in the uk are monochorionic?

Answer 6

Third

Question 7

What gestation should monochorionic twins be delivered at?

Answer 7

MCDA- 36-37/40

MCMA - 32-34/40

Question 8

Why should ibuprofen be avoided in pregnancy?

Answer 8

Before 30/40 = increased risk of miscarriage.
After 30/40 = premature closure of the ductus arteriosus in utero. possibly persistent pulmonary hypertension of the newborn

Question 9

What is the risk of toxoplasmosis transmission to the fetus if maternal infection occurs:
A) <4/40
B) 13/40
C) 36/40

Answer 9

A)<1%
B) 10%
C)>60%

if transmission does occur in early pregnancy then the risk of congenital abnormality to the fetus is higher than if transmission occurs later in pregnancy. May cause miscarriage or fetal abnormalities such as microcephaly, hydrocephalus, cerebral calcifications, cerebral palsy, epilepsy choroidoretinitis and thrombocytopenia.

patient should be started on spiramycin and the option of amniocentesis for fetal diagnosis at 16 weeks discussed.

Question 10

Are beta blockers safe in pregnancy?

Answer 10

Yes. Commonly used and benefits generally outweigh the risks. But potential risk of growth restriction there growth scans are advised.

Question 11

Risk of recurrence of shoulder dystocia?

Answer 11

1-25%

Question 12

Maternal mortality Rate in UK

Including direct and indirect

Answer 12

8.76 per 100 000 maternities