General Obs questions

Question 1

Which is the best way of estimating gestational age?

Answer 1

First trimester ultrasound at 11-13/40 weeks
using CRL = crown rump length
Dating using ultrasound is less accurate beyond this gestation, particularly >20/40

Question 2

What is LMP and Nagele’s rule?

Answer 2

First day of LMP (should be a normal period)
Her cycle should be regular (28 days)
Nagele’s rule (for a 28 day cycle): LMP, subtract 3 months, add 1 year 7 days

Question 3

What’s gravidity?

Answer 3

how many times a woman has been pregnant - includes miscarriages, ectopic, termination, live birth, stillbirth & molar pregnancies

Question 4

What is parity?

Answer 4

• how many babies a woman has delivered at 24+ weeks gestation, alive or dead
• pregnancies <24/40 denoted by suffix e.g. P3^+2

Question 5

State the gravidity and parity of Mrs X: currently 12/40, two miscarriages at 8/40 and at 20/40, one son born at 38/40

Answer 5

G4P1 or G4P1^+2

Question 6

State the gravidity and parity of Ms Y: not pregnant, has twins born at 34/40

Answer 6

G1P2 or G1P2^+0

Question 7

State the gravidity and parity of Miss Z: currently at 28/40, one previous ectopic, two terminations of pregnancy both at 6/40, one stillbirth due to abruption at 25/40

Answer 7

G5P1 or G5P1^+3

Question 8

Primigravid

Answer 8

First ever pregnancy i.e. G1P0

Question 9

Nulliparous

Answer 9

has no delivery of a baby >24/40

Question 10

Multiparous

Answer 10

has had one or more deliveries of babies >24/40

Question 11

What is the risk of Downs syndrome in babies of women over 45 years?

Answer 11

2-3%

Question 12

When is the first trimester?

Answer 12

LMP to 14/40weeks

Question 13

When is the booking appointment?

Answer 13

8-10/40 weeks

Question 14

When is the dating scan?

Answer 14

11-13/40 weeks

Question 15

When is the second trimester?

Answer 15

14/40 - 28/40 weeks

Question 16

When is the anomaly scan?

Answer 16

20/40 weeks

Question 17

What is tested for in the anomaly scan?

Answer 17

Spina bifida
Anencephaly 
Gastroschisis
Exomphalos
Cleft lip
Edward's & Patau's
cardiac/ kidney problems
Diaphragmatic hernia

Question 18

Is the anomaly scan compulsory?

Answer 18

Optional

Question 19

When is the combined screening test?

Answer 19

11-13/40 weeks

Question 20

When is the quadruple test?

Answer 20

14-20/ 40 weeks

Question 21

What is the “late bookers” test and how many women on average have this?

Answer 21

Quadruple test

1/6 of women (~15%) present after the first trimester

Question 22

When does rhesus immunisation of rhesus negative mother occur?

Answer 22

28/40 and 34/40

Question 23

When does the anterior fontanelle/ bregma close?

Answer 23

at 18months

Question 24

When does the posterior fontanelle close?

Answer 24

6-8weeks

Question 25

How many sutures make up the anterior fontanelle? Name them

Answer 25

Intersection of 4 sutures (approx 2-3cm in size)
Left and right coronal sutures
Frontal suture
Sagittal suture

Question 26

How many sutures make up the posterior fontanelle?

Answer 26

Intersection of 3 sutures

The left and right lambdoid sutures and sagittal suture