😀 EASY

Here are 10 MCQs to test/revise a few key concepts from the lecture on Methods of Dating a Pregnancy. Good luck!

Reviewed by Jonathan Loomes-Vrdoljak

Methods of Dating a Pregnancy

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Question 1
How many weeks is term?
A
24-37 weeks
B
37-42 weeks
C
42 weeks
D
42+ weeks
E
Depends on the pregnancy
Question 2
From which week is the developing embryo referred to as a foetus?
A
4th week
B
6th week
C
8th week
D
10th week
E
12th week
Question 3
How many weeks is 1st trimester?
A
8 weeks
B
10 weeks
C
12 weeks
D
14 weeks
E
24 weeks
Question 4
Which weeks for the 2nd trimester?
A
13-26 weeks
B
13-28 weeks
C
13-32 week
D
13-36 weeks
E
13 weeks to term
Question 5
What are the 3 common methods of dating a pregnancy?
A
Obstetric calendar wheel, Naegele's Rule, USS
B
Obstetric calendar wheel, Naegele's Rule, Symphysio fundal height
C
Obstetric calendar wheel, USS, Symphysio fundal height
D
Naegele’s Rule, USS, Symphysio fundal height
E
Naegele’s Rule, CT Scan, Symphysio fundal height
Question 6
Which of the following is true of Naegele's Rule?
A
Assumes a 21 day cycle and uses first day of last menstrual period (LMP)
B
Assumes a 24 day cycle and uses last day of last menstrual period (LMP)
C
Assumes a 24 day cycle and uses first day of last menstrual period (LMP)
D
Assumes a 28 day cycle and uses first day of last menstrual period (LMP)
E
Assumes a 28 day cycle and uses last day of last menstrual period (LMP)
Question 7
A 34 year old female presents to the GP as she has had a positive pregnancy test. She would like to book in for routine antenatal care with the surgery’s midwife. She tells you her LMP was on the 10th of August and her cycle is usually 30 days. What is the estimated date of delivery? (Use Naegele's Rule)
A
15th May
B
16th May
C
17th May
D
18th May
E
19th May
Question 7 Explanation: 
To calculate the estimated due date (EDD) using Naegele's Rule, you:
  • Subtract 3 months from start of last menstrual period
  • Add one year
  • Add seven days

This assumes a 28-day cycle. As this expectant mother normally has a 30-day cycle, some sources/textbooks indicate you should add or subtract the difference. In this case, 30 - 28 = 2, so you add 2 to get the EDD.

However, remember that the EDD is still advisory. It can be influenced by several factors including how regular a woman's periods are, ethnicity, weight, parity. Source: https://dx.doi.org/10.1111/ajo.13253

Question 8
Where do we measure from and to using ultrasound for the crown-rump length?
A
Top of the head to the bottom of the buttocks
B
Top of the head to the bottom of the heel
C
Top of the fontanelle to the bottom of the buttocks
D
Top of the fontanelle to the bottom of the heel
E
Top to bottom
Question 9
When is symphysio-fundal height measured from?
A
20 weeks
B
21 weeks
C
22 weeks
D
23 weeks
E
24 weeks
Question 10
How do you measure symphysio-fundal height?
A
Xiphoid process down to the pubic symphysis 
B
Uterine fundus down to the pubic symphysis 
C
Xiphoid process down to the ASIS
D
Uterine fundus down to the ASIS
E
Xiphoid process down to the PSIS
Question 10 Explanation: 
Remember TOP-DOWN! And hold the measuring tape with the blank side facing up.
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